Ac Compressor Kicks On And Off While Driving

Increased airflow over the condenser cools the refrigerant best, leaving the compressor with less "work" to perform. The last two involve hooking gauges to the system and someone who knows how to read them. Long story short, air conditioner compressor noises are usually bad news. The AC only works when the car is cool. I took the air conditioner apart today and verified that the fan does spin if you do it manually, so I know it is not a bearing. Once I got going, seemed to be fine again. My Car AC cuts off (Trips) frequently maybe some optimisation that tries to ensure fuel efficiency by tripping the AC when RPM is starting to drop or while moving the car in lower gears. I replaced the valve and now when I star to recharge the system the compressor goes on and off. It's worked perfectly since day one. i have not had a chance to get pressure readings yet. Or show off your own car mod on Wednesdays. The car gets cool but not cold during the day in operation, with ambient temps of at least 80-85+ degrees. they should both read the same psi as the ambient temperature +/- a couple of psi. Check the front side of the clutch to examine its condition. The AirCon can switch itself on and off intermitantly when you have a faulty resistor pack/thermostat, faulty track on your Accelerator position switch, faulty Hot-Cold control, faulty system pressure switches, compressor clutch, or associated relays and wiring. You should hear the AC compressor working or attempting to work. The current belief is that running propane gas while driving is extremely dangerous. The compressor may be loose. When it heats up during the day it will run for a while and then the compressor kicks off. Never any sponsored content, just the truth about everything! Learn how to fix your car and how it works. 5 lbs and rechecked for leaks and proper cooling. air conditioner compressor kicking in and out full freon only at idle When i am driving the car the ac works great. While the A/C is on in my 2014 Nissan Murano, I feel the A/C temperature go from cold to warmer to cold to warmer. The Neocarbonix™ team will travel to international conferences and exhibitions to educate the Lithium-ion battery market about their revolutionary electrode technology. After calling around town, no local shops or dealers had any way to do so without building an adapter for a pressure gauge. I just had the AC compressor replaced bout 2 weeks ago. the above answers I probably right but if its a unusually strong shake it might be the ac acting up, your a/c is run by a belt that spins the a/c pulley, most likely that pulley's bearings are about frozen, or at least something in that range. Judy's mom brought her '04 Subaru Forester down when we finally convinced her to get out of "cold country" and stay with us here in Texas and for some time now the A/C compressor has been cutting out and not re-engaging when discharge pressure drops off to cut-in resulting in no cooling. Reinstalled the air filter. One check engine light in 2004, replaced the EGR valve. updade Found Problem2000 Jetta TDI AC not working sometimes When the ac works, it works good. any ideas? while,took 3 days of driving to finally act up this time. In smaller, lower horsepower engines this loss is more pronounced. IP: Logged Message: what was you final out come. Upon inspection, the compressor does not kick on at all. Air Conditioning problem. My Car AC cuts off (Trips) frequently maybe some optimisation that tries to ensure fuel efficiency by tripping the AC when RPM is starting to drop or while moving the car in lower gears. When it come on it tries to cool but the compressor doesn't stay on long enough. Actually its been proven that the power required to overcome the additional aero drag from open windows on your car at speeds over 50 mph exceeds the power consumed by the AC but gained back by the aerodynamic streamlining of having the windows cl. I popped the hood and noticed that when the AC compressor kicks on that it almost stalls the engine. The 2006 Chrysler PT Cruiser has 9 problems reported for rough idle when ac is on. Changed the low pressure switch and still having the same problem. Hot air comes from the vents when the AC is off due to ducting "gains" (heat we are talking about). With a little maintenance and a watchful eye though, you can get the longest lifetime out of your air conditioner and, ultimately, save a good amount of money from doing so. While driving the Excursion in warmer months we try and keep the bedroom door closed, and all the rear A/C vents closed, because the rear engine diesel leaks a lot of heat into the back of the RV. The EC button is for "economy" and when you press this button, it turns off the a/c compressor, to give you more economy or mpg while your driving Read More Asked in Heating Ventilating and. If you have a compressor that kicks on and off, you have what is known as a cycling clutch compressor, and it runs at full displacement, but only for periods of time. I assumed my inline fuse had overheated or something. Very sporadic. My A/C cuts off after several minutes of normal operation 1 Answer. Now, the air conditioner comes on and runs cold for awhile then the air stops running cold but the blower is still on. Appreaciate any input. my 2005 GMC sierra always used to blow ice cold, now it blows only slightly cool when driving and a little cooler when idle/not moving. If I manually shut it off when driving, the difference is obvious so I am sure the clutch is still engaged the other times. 2nd Gen Dakota Tech - Air Conditioner on when not supposed to be - I have a 2000 SLT, 4. The AirCon can switch itself on and off intermitantly when you have a faulty resistor pack/thermostat, faulty track on your Accelerator position switch, faulty Hot-Cold control, faulty system pressure switches, compressor clutch, or associated relays and wiring. 98% of all a/c cooling issues results in a leak. Otherwise it may be internal of the compressor. Problem is that on hot days, above 90, it will work for a while, maybe 20minutes or so, then quit, then it might come back on for about 10 minutes then go off again. When it is cold in the morning it works fine. But then, when the AC finally does kick in, it. If it's blinking 3 times, then you are low again and the compressor is not kicking on. Apart from this, there is a load humming noise when driving with the A/C on. We typically turn the A/C off before turning the car off, and turn the A/C on right after turning the car on. Normal operation is that with the compressor off and allowed to sit for a while both low and high sides should equalize with the same pressure readings. I have a new battery I've cleaned the battery terminals/connections, I've cleaned the chasis ground as well. If this is too frequent, is it a sign that I need to add refrigerant? Thanks for any help. I show in this video what was causing the problem and how I fixed it on my 2005 Hyundai Santa Fe. Lack of oil may ultimately cause compressor failure, just like running a car motor without engine oil will cause seizing. Kia Rio Noise or Vibration When AC Compressor is On. I have around 35-40,000 miles on it. He took a look and saw the compressor was in fact not turning on so he added some freon to see if the pump need more charge to turn on the compressor. Partially blocked condenser/radiator (bugs, dirt). 1 Chevy Workhorse was blowing hot air from dash unit, also making squealing noise. I am planning to just replace the pulley, bearing, coil and clutch plate, as I can do it myself without having to take it to a shop for freon removal. Used gauges with my mechanic. Here's the problem: Engine running and a/c on max - blower works fine, but the compressor kicks on for about 5 seconds, then kicks off for about 15 to 20 seconds. It was kicking off and on quite frequently. When it heats up during the day it will run for a while and then the compressor kicks off. Now, if I turn it on and then drive around (or turn it on while driving) I know issues. Anyway, he replaced the clutch and probably turned it on and the thing worked great. There are many reasons why your AC could be making noise, some easier to fix than others. From the research I have done it sounds like there are two common. I suggested maybe a relay fault or a faulty connector. carcomplaints. How long before water exits the drain? 10 min?. Re: AC problem: compressor engages, but there's no cold air Whether the compressor engages or not is moot. This means its ruled down to a idle air control valve not adjusting correct or a internal air compressor issue. The Zero Breeze is a true portable air conditioner using battery or AC adapter power sources. With a 90 hp Aveno you are going to feel it, and you’ll notice a significant power loss on the road. and about 7 inches tall)!. Do it little at a time. Hi, let me start off by saying that when in park the ac cools perfectly fine and the the compressor almost never cycles. com: Adding freon or topping off a cars A/C system is the most common task performed to restore performance and get cold air blowing again. Otherwise, I can't get the compressor to kick on and if it does (rpms dip lower and can hear the fan) it is only for a second or 2 and then it stops again. I have narrowed it down to my cooling fan will kick on once it reaches temp and works like it should. I have been unhappy with my A/C (in Arizona). After calling around town, no local shops or dealers had any way to do so without building an adapter for a pressure gauge. Think hard before fixing that broken air conditioner the compressor, the evaporator and the condenser. At about 30 minutes into the driving trip, only warm air blows. com or the September 2012 issue of Muscle Car Review Magazine. In that case, it makes sense to keep the fan on while the AC is running because the AC thermostat operates by manipulating compressor clutch. What could be the reason? The dealer says there is no much diffbut i feel it while driving. If you have a situation where your car's air conditioner compressor clutch doesn't engage, try the troubleshooting techniques described here. I went out to the car at 1:21 pm (6 min) and the car was blowing warm air.  The AC unit is always powered on, but by adjusting the thermostat I can make the compressor and fan kick on while letting it use the built in cooldown settings. The car gets cool but not cold during the day in operation, with ambient temps of at least 80-85+ degrees. any idea what may be causing this inconsistency to happen?. I been told that a bad ac relay can cause that cold/hot air while driving. It show that it is a light green wire coming from the HVAC control module, section "B-12" on my schematic. AC Compressor Clutch turns on and off - posted in Virtual Mechanic: Any ideas on why it would act this way? I filled it up to about 20psi and it was working ok but not quite cold enough (just cool). 1996 dodge Dakota 4 cylinder, 5 speed, Manual transmission. It doesn't blow heat, just becomes ambient, musty and damp, on both the passenger and drivers side. We do an A/C install in a 1965 Pontiac GTO. This is an otherwise well running 1998 Taurus. Is A/C compressor supposed to cycle on/off while car is in motion/driving? 5 Answers. these step can help ac. When you turn on the vehicle AC , engine triggers some elements, like air control motor or idle speed, so that idle compressor can be increased by compensating with extra drag. For anybody out there who has a noisy/bad AC compressor clutch, I'd like to throw it out there that you can replace the clutch without removing the compressor and draining your freon. Sometimes right after starting the car if I switch the compressor on it will cause the car to run rough for a bit and then it just stalls, but will start up again without a hitch, maybe running rough for a hundred feet or so. With our onboard compressor system, all adjustments are automatic and made with the touch of a button- all while driving!. Mine would run fine when outside temperatures were under 80 degrees. One major sign that an AC compressor has gone bad and needs replacement is when the air conditioner is blowing out warm air. I just bought a 2016 Explorer for my wife and I noticed that when she starts her car and the AC is off, there is no electric fan noise. Now you can feel the load when the A/C kicks on while going up a hill. Since we are asked this question so often though, we do have a few good answers ready to go. Once the air. i'm not an ac expert, but usually the compressor cycling is due to either too low, or too high of pressure. I didn't really use my AC alot last year but I have been using it slot lately down here in SC due to the heat and humidity. Saturday Night Live’s New Season Kicks off with a Saturday Night Live’s New Season Kicks off with a Take on the Obvious: Puerto Rico. The compressor clutch kicks on and off randomly during the driving. An evaporator is used on freightliner trucks as a heat exchange medium to move the heat generated by the system away from the air conditioning unit. Cost a total of $85 verse around $120 for the clutch + freon. Most cars on the road use a serpentine belt. I actually offered to take the car back yesterday while he was driving us home, but he was determined to replicate whatever "bug" is doing this. 5 from the 14 volts otherwise. you were going to be ripped off by some tech while at the. Chevy Suburban and Tahoe AC and Heater Problems you start the vehicle other times it will cut off while driving, other times it may click off and then comes right. Average failure mileage is 38,300 miles. Stopping at red lights the a/c will get warmer due to the compressor kicking on and off, and you can forget hoping in, and sitting in the air without driving. Turn the replacement compressor’s shaft 10-15 times by hand to displace refrigerant oil (this will help prevent damage to the compressor). The compressor pumps Freon throughout the AC system, either the older type R12 Freon which costs as much as gold it seems these days, or the new environmentally-friendly R134A Freon. However, eg: when you are driving and coming to set of lights, and motor is idling down, the compressor sends a vibration through the car, and you can hear, and feel the dash vibrate. the house was built in 1983. The acceleration is slightly slower when it's on and the temps at the outlet stay the same the entire time unlike when a compressor switches off and the air warms up. If you want to contribute your AC-related fix or experience, please go to the relevant forum and click the NEW TOPIC button and write what you know. Nothing is really off-limits. Vehicles which were manufactured in the year 1994 and early used to use the R12 for the air conditioning. 36,000 miles, barely over. The pressure reaches 55 lbs and goes down again. I turned it off, and rolled down the windows, after about 30 minute break I turned it back on, it worked great for the rest of my 3 hout trip. Any thoughts?. The split air conditioner is one of the most widely used type of the air conditioners. Make sure the air-recirculation button is not selected instead of the air conditioning. When I turn the AC on (GM A6 compressor) the alternator "quits charging". Get the details at hotrod. Small cars typically have stacked AC and engine radiators cooled by a single fan. It seems to me if I recall correctly, that the only position the AC compressor does not run is in the OFF position, and the VENT position. Just an AC button, fan speed, temp and location. Ambient temp is 88 to 90 degrees, about 65% to 75% humidity. Then it's a bad field coil on the compressor clutch assembly. This cycle just keeps repeating. Anyone added electric fans to an F150?. My car jerks while driving or some times when I take off from a stop. 98% of all a/c cooling issues results in a leak. to the AC compressor kicking on and off. 7L if that's good turn your A/C on full blast and see if your condenser fan (small fan next to fuse box) is running it should run non stop when A/C is on if not running replace the condenser fan. I assumed my inline fuse had overheated or something. Kind of sick of it now and I want to sort it out before summer so I thought I would ask what you guys think would be causing my VT's air con to blow out warm air even when set to cold. The air conditioner compressor will be mounted within the A/C unit base which had rubber feet known as isolation feet. Drive around for 20 minutes, and all of a sudden, it would come on and work perfectly. At higher engine speeds, even with a slipping belt, the compressor could be. What began as a routine traffic stop turned into a fight when the driver, identified as 45-year-old Christopher Rogers, of. The pressure reaches 55 lbs and goes down again. Will the compressor run before the system is charged or does. Compressors remove the hassle of pulling over or searching for service stations with air pumps. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. AC turns off while driving and will not come back on. The clutch on the AC compressor and radiator fan seem to kick on and off at same time with a 2 to 3 second delay. If I am stopped when the AC comes back on, I can feel the compressor kicking back in as a brief shudder. Now, the air conditioner comes on and runs cold for awhile then the air stops running cold but the blower is still on. my old ac compressor starting clicking on and off every few seconds then it would stop for a while then repeat the cycle,when i turn the selector to floor it would stop,i guess this keeps it off. I assumed my inline fuse had overheated or something. " Short cycling is bad for a few reasons: It means you're wasting energy and driving up energy costs for your home. Really need to get it diagnosed, in that it came be a number of things. It takes this much pressure to turn the low side switch on and allow the compressor to work. The compressor is kicking on and not making weird noises, so I thought it was just low on refrigerant. It will spin freely until you turn the air conditioning on. Discuss Short Vibration on 2001 Windstar whenever A/C compressor starts in the alt. What is a compressor clutch? Before the compressor turns on, a special electro-magnetic clutch, conveniently called the “compressor clutch,” is necessary to engage and disengage the compressor cycle. The ac relay to the compressor only supplies the 12 volt power to the compressor through the clutch coil, when it is pulled in by the HVAC control module. car not running. The one thing they though was condenser icing up. The yellow plastic contraption boasted not just a compressor (“250 psi!”), but a built-in gauge, a flashlight and a red hazard blinker, nozzles for inflating beach balls and pool toys, and a. Stand in front of the AC compressor at the front of the engine. I only felt it come on once for about 5 seconds while I was driving yesterday. Today, I go to turn it on and it's just blowing warm air. I replaced the valve and now when I star to recharge the system the compressor goes on and off. If I select one of the heater positions, sometimes I get cool air that way. Sometimes it'll start again after 45 minutes or so of highway driving. So I just got ac in my car again and bought a new belt and recharge the ac. the air conditioning compressor clutch will wear and the gap will become to large for the compressor. I bought a replacement/spare ac wot cutout relay, swapped it in with a dab of dialectic grease, did not help. The major reasons behind the popularity if split air conditioner are their silent operation and elegant looks. See photos, they are clear and close up for the problems. The EC button is for "economy" and when you press this button, it turns off the a/c compressor, to give you more economy or mpg while your driving Read More Asked in Heating Ventilating and. Problem is that on hot days, above 90, it will work for a while, maybe 20minutes or so, then quit, then it might come back on for about 10 minutes then go off again. My 2002 Chevy S10 A/C unit goes on and off 5 Answers. Of several suggestions given, a working ac system is the quickest way to test wiring for 12v to the fan. Having your car’s air conditioning go out suddenly can ruin your day fast. While my original compressor and shocks seemed to function normally, the compressor was pretty loud, and would kick on for 20 seconds every time the truck was started, put in park, or even idling in gear at a light. I notice that as well but I dont think its the AC compressor - I dont use the AC. If I turn the AC off and then back on in 10 seconds or so, the noise will often not reappear. Ac compressor won't stay on {03 Blazer} [ 1 Answers ] I have an 03 chevy blazer. If the AC compressor obviously kicks on, the switch is bad (provided the pressure is high enough). I found that the freon line from the compressor was routed under the steering shaft and was, in fact, touching. How often should an AC compressor engage and disengage? At idle, mine will run, disengage for about 3 seconds, then engage again. Is air conditioner compressor supposed to kick on even while not in use on 1999 ranger? If the compressor keeps cutting on and off its supposed to do that for fuel economy. It may be the pulley itself seizing which you may be able to recover with some corrosion cleaner, lubricant etc. While the R134A doesn’t damage the Earth’s ozone layer like its predecessor the R12, it still is not considered the safest refrigerant. When it makes the noise as soon as I turn the AC off it stops. Gauge reads in the blue zone, or adequately charged zone with a/c on max setting. Pulled over to check it out and everything looked fine with the fuse and box, but the ac compressor wasn't spinning even with ac on (pulley free-wheeling around stationary clutch pulley). Check the front side of the clutch to examine its condition. I replaced the valve and now when I star to recharge the system the compressor goes on and off. In both Eco & Max modes, compressor seems to kick in when the temperature rises 2 degrees. This happens in drive as well, and when driving, since the rpm's drop and come back up, the vehicle surges at low speeds. The noise stops the moment I switch off the AC. The vehicle was parked for most of the last 25 years, so I imagine the lubricant had drained from the compressor. Have someone turn on the AC while you stand where you can see the compressor wheel. FYI: When you turn on the AC, the fan needs to kick on and pull cool air over the condensor. What could be the cause of this?. I have seen it so many times on vehicles where they just don’t use their AC; however, if your AC compressor doesn’t work, you won’t have cold air coming from your vents. On some vehicles it is possible to buy the compressor separate from the clutch/pulley. What could be the reason? The dealer says there is no much diffbut i feel it while driving. We offer a variety of Mercedes Ac Compressor for your automotive needs. It will spin freely until you turn the air conditioning on. At higher engine speeds, even with a slipping belt, the compressor could be. Freon levels are fine so I was thinking of a it being some sort of switch issue. Air Conditioner Not Blowing Air. Small cars typically have stacked AC and engine radiators cooled by a single fan. This water would fall down to drain off in the primary drain line. Basically the a/c stops cooling after a while, sometimes 30 mins to an hour. This is an otherwise well running 1998 Taurus. I've NEVER had a seconds problem with the AC. Manual control, the fan blows warm air, A/C light works fine. Saturday’s ISL opener kicks off at Indiana University’s Natatorium starting at 11 a. Hi Randy i have a duo therm 13000 btu rooftop ac and about a month ago i had turned the ac downtoo far and the coil froze up bad i then turned off the ac but left the fan on and it started leaking water into the rv from the coil through the air intake where the filter is in the roof which the control board box is right there im not sure if it. The AC Compressor in most of these GM vehicles is not quite like other compressors. Now, the air conditioner comes on and runs cold for awhile then the air stops running cold but the blower is still on. The yellow plastic contraption boasted not just a compressor (“250 psi!”), but a built-in gauge, a flashlight and a red hazard blinker, nozzles for inflating beach balls and pool toys, and a. Then, I turned on the car and turned on the AC and the compressor would kick on for maybe 7 seconds, then kick off again. zxj24 · Registered. You can watch the AC compressor being energized. Once the air. A/C fluctuates between hot and cold while driving - 2011 Ford Fiesta Hi, folks, I am by no means experienced in this sort of thing, but I will do my best to describe my problem here, in the hopes that someone can offer some insight. The air conditioning compressor is one of those parts that typically gets a lot of usage and provides that critical cool air on hot summer days. After the car is shut off for a while the ac works but then will go off again. but the fans will not kick on with the A/C compressor. When it is cold in the morning it works fine. 7L if that's good turn your A/C on full blast and see if your condenser fan (small fan next to fuse box) is running it should run non stop when A/C is on if not running replace the condenser fan. Anyway, I might take it apart and see what can be done but in the meantime I'm looking for the replacement part. I have no noticeable problems with my house's electricity, but when my Air Conditioner kicks in (and here in Central Texas, it kicks in year round) my lights dim for a second or so and then run normally. The same AC compressor is likely used in several model cars, including bigger ones with more powerful motors. From the research I have done it sounds like there are two common. I assumed my inline fuse had overheated or something. Dodge Ram 1500 intermittent AC, Compressor quits, blows cold, then warm, warm AC There are basically three sections to the AC system; the sensors (high and low pressure sensors and the AC on/off switch), the command unit (the powertrain control module- PCM), and the "doing" components (the compressor clutch relay, compressor clutch, and the. A few days ago my wife mentioned that the AC wasn't as cool as it should be and that it would make a weird noise with an odd smell in traffic on a really hot day. Car started having problems with AC in 2015. Maybe I just got lucky. car makes loud noise on passenger side while car is off. An air conditioning compressor is designed to move “gas” and not liquids or solids. I replaced the valve and now when I star to recharge the system the compressor goes on and off. cycling on & off. Disconnect the cooling fan and lay the connector to one side or tie it off for measuring 12v. I would welcome any ideas and suggestions. While I'm driving with the AC on, I can feel each time the AC engages and dis-engages. The most honest and funniest car channel on YouTube. When Im driving, I turn on my AC the car seems to lose power, And when im parked sometimes my rpms jump up and down like it wants to turn off. By ac tripping,I presume you mean ac compressor cutting off,right? The compressor trips when the required grille temperature is achieved ; and it is normal for the compressor to cut off and on. There are many reasons why your AC could be making noise, some easier to fix than others. A me My car bogs down everytime I turn on my AC, What can I do to fix the problem! - 2000 Mitsubishi Eclipse. It doesn't blow heat, just becomes ambient, musty and damp, on both the passenger and drivers side. I'm finally getting the AC system charged and I hooked up the compressor wire. A/C button light is on - but cold air stops blowing and warm/hot air (like just open vents) blow in. How to Troubleshoot the Air Conditioning in a Dodge Caravan. My AC randomly turns off while I'm driving. Anyway, he replaced the clutch and probably turned it on and the thing worked great. After several minutes (say 10), I rolled up the windows to get the compressor to kick off (this is the point at which the pressures began to drop slightly). Have someone turn on the AC while you stand where you can see the compressor wheel. Have an assistant turn on the AC controls to maximum. But I'm willing to try. Seems its under the car (the location to refill. If you’re about to go to bed and want to avoid nightmares, you might want to put off reading this until morning. Switching the AC on before driving will just be a wastage of time and fuel. 1 on the high side, 1 on the low side. While the R134A doesn’t damage the Earth’s ozone layer like its predecessor the R12, it still is not considered the safest refrigerant. Compressor Sound Blanket Wrap; A compressor is what moves refrigerant though a unit and transfers hot and cold in or out. Hello, i took a trip from AZ to CA and i didn't use the A/C. Refrigerant does not evaporate, it leaks. Then the heater/AC crapped out and the instrument cluster began to fail. Used gauges with my mechanic. If the fan is not working, the AC will still cool when you are driving because air is being forced through the condensor. It show that it is a light green wire coming from the HVAC control module, section "B-12" on my schematic. compressor clutch relay is turned on and off. if the charge is good start the car turn on the ac and if the compressor doesnt kick on, take the cover off of the fuse/relay box under the hood and look for the ac compressor relay. The cooling fans kick on when AC is on. The air con worked very very intermittently, so I took it to quikfit for a regas, and they told me it had plenty and the reason the aircon wasnt working was the AC Compr. 7L if that's good turn your A/C on full blast and see if your condenser fan (small fan next to fuse box) is running it should run non stop when A/C is on if not running replace the condenser fan. Tensioner failures are pretty common on the e90 platform. The pressure reaches 55 lbs and goes down again. Tool giveaways every Monday to help you with your own car projects. my ac compressor on my 2007 grand prix kick off and on while I am driving than it wont cut back on 2 Answers. While the A/C is on in my 2014 Nissan Murano, I feel the A/C temperature go from cold to warmer to cold to warmer. It show that it is a light green wire coming from the HVAC control module, section "B-12" on my schematic. I've NEVER had a seconds problem with the AC. I assumed my inline fuse had overheated or something. The 2006 Chrysler PT Cruiser has 9 problems reported for rough idle when ac is on. The controlls seem to operate properly. So I started looking around for solutions. This car has the manual ac with the two scrolling wheels to set temp - NO digital display. I came across your forum while trying to figure out what is wrong with my AC. AC blows cold then hot upon acceleration and. Tried A/C Pro but when hooked up the pressure guage goes all the way up into the Red when compressor shuts off and then down to safe levels when engaged. Actually its been proven that the power required to overcome the additional aero drag from open windows on your car at speeds over 50 mph exceeds the power consumed by the AC but gained back by the aerodynamic streamlining of having the windows cl. RPM drops to 1k then does a quick bounce to 1200 and back. its very intermittent Now sometimes it doesn't cool while moving. I have narrowed it down to my cooling fan will kick on once it reaches temp and works like it should. the compressor shuts off with the fan blowing warm, humid air that you can smell. A/C compressor seems to turn off at idle and while she was driving, the a/c was blowing nice and cold. Your Mustang’s air-conditioning compressor, which is an engine-driven pump, pressurizes the system. do this until i turn. I don't believe I've seen a separate AC clutch kit for the e90 platform. For anybody out there who has a noisy/bad AC compressor clutch, I'd like to throw it out there that you can replace the clutch without removing the compressor and draining your freon. The vehicle was taken to west hill Ford (1100 oyster bay Ave s, bremerton, wa 98312) where it was diagnosed that the air conditioner switch, condenser, and the expansion valve needed to be replaced. compressor clutch relay is turned on and off. Next up is knocking or clicking sounds while the air conditioner is running. When it heats up during the day it will run for a while and then the compressor kicks off. i'm not an ac expert, but usually the compressor cycling is due to either too low, or too high of pressure. 1996 dodge Dakota 4 cylinder, 5 speed, Manual transmission. It's a classic sign of the air conditioner compressor fan going out. Then it's a bad field coil on the compressor clutch assembly. I am 99% sure it is the compressor (which is brand new Sanden from VA) since the noise disappears when the a/c is shut off and. If you listen closely, you might hear it actually click off while idling/driving slow, and that is going to be why it is no longer blowing cold. I have a new battery I've cleaned the battery terminals/connections, I've cleaned the chasis ground as well. Sometimes right after starting the car if I switch the compressor on it will cause the car to run rough for a bit and then it just stalls, but will start up again without a hitch, maybe running rough for a hundred feet or so. Driving down the road one day i smell a familar burning :/ Pull over to a parking lot and remove unit from dash in 5m flat. While your air conditioner is technically a separate system, it's tied to the rest of the engine by the serpentine belt. If your car is at operating temperature [heavy mark] and AC is running the high speed will kick on to not only keep the engine cooler but the main reason is to cool the lines for the R134 phase change. after two treatments of stop leak, so far so good. Keep cool when driving around in the summer time. They usually kick on within 10-15 seconds of turning the AC on and run about 90% of the time I'm driving. When the evaporator coil or cooling coil of the unit gets covered in ice or frost, it can cause the unit to malfunction by turning on and off in short bursts. it sounds like the heating part of it is trying to turn on while the air condition is running and it does it off and on while having cool air. what can cause air conditioner compressor to kick on and off repeatably causing air to be cold then not cold again and again 1 Answer. Notes: Barksdale currently trains with Gamecock Swimming in Columbia, S. You need to look at the sight glass with the AC on and see if you see any bubbles in the glass. Upon inspection, the compressor does not kick on at all. He took a look and saw the compressor was in fact not turning on so he added some freon to see if the pump need more charge to turn on the compressor. In order to get to the ac compressor i reomoved my air filter. You should hear the clicking of the A/C. Replied by quickNpainless on topic Compressor will not cycle OFF well the compressor cycles on when the pressure sensor on the high side of the system sends a signal that the pressure has dropped and the compressor needs to kick on to get the pressure back where it needs to be. I have to turn it off for the temp to come down. See photos, they are clear and close up for the problems.