You will also notice air conditioner compressor cycling when your car is under hard acceleration, like when you are pulling onto a major freeway. So I bled off some of the coolant until the compressor stayed on. Bled it off, and it seemed to be ok, then took it to the dealer, they drained, refilled with the “correct amount” saying it was a little low, but now it’s cycling and pulling again, enough to be annoying (plus there’s an annoying rattle between 2000-2500 rpm). Both the pulley and the clutch should be spinning. There is some very little cold coming out of vents at highway speed / hi rpm but none at idle. BTW. Sure enough, he said that the low pressure was being sucked down to about 20 PSI and the high-pressure was kicking way up again past 400 PSI. So, down to the local automotive store. Thank you again for sharing! He got that replaced and also replaced the serpentine belt while he was at it. I was wonderig why my compressor kept cycling. We’re just a meagar few backyard mechanics. I came in and searched causes for the air compressor’s rapid cycling. Take it anywhere else more than likely you’ll be screwed . It is low on freon and that is the reason for the cycling. I took the car to him a few years back to have him replace the timing belt and serpentine belt. If the compressor clutch is not engaging, there are many possibilities. what is happening?? Took it back and told them what I experienced, so hopefully we can get it resolved. Website Design ● Website Hosting ● Logo Design, Garden Slowdown – Peas Stopped, Cooler Weather, http://www.oreillyauto.com/site/c/detail/INT0/MF5.oap, Website Assistance for The Catalog Center, Website Design for Independent Medical Supply, LLC, Website Design for Alternatives Counseling, LLC. Show Less. I released some refridgerant and now its working just fine. This time, I revved the car up to about 1,500 to 2,000 RPM (since the Civic seems to idle at around 500 rpm). After taking some out, the compressor stopped kicking on and off – and the high pressure then stayed fairly stable between 325 and 350 psi. Went through the same thing on our 2002 CRV. It is dated 8\22\15. The air conditioner compressor was rapidly cycling on and off. The clutch is controlled by the A/C button, not by the blower switch. Just turn the A/C on and you should be good. Compressor Failure. Like the thermostatic switch, the turning on and off of the pressure cycling switch controls the operation of the compressor. You said it goes from low to high. When there’s a problem with the compressor clutch, … “Great,” I thought,”I just killed my AC at the beginning of June!” I went for a test drive and sure enough, the AC was not cold at all. From the low side port, I know, but do you hook up a ‘cheap can gauge hose’ then pull trigger with no can attached and that does it ? In other words, my car’s ac is being a bitch! Written by admin on May 29, 2019. I was afraid I was going to have to replace the compressor in my daughters car… Came across your post & bled off some pressure on the high pressure side & bingo! Several conditions cause short cycling, including a faulty or obstructed thermostat, leaking refrigerant, icy coils or an HVAC system that is too big for the building in which it is installed. If you get that the air conditioning (AC) compressor clutch is not engaging in your car, you might need to get some answers. The compressor was fully on and the car just was barely cooling before I began adding the freon into the car – but it certainly was not keeping up and was not cool enough. As deal, I requested the seller to check the gas system, and they did it. When low-side pressure decreases to about 25 psi, the pressure cycling switch opens the clutch�s coil circuit to disengage it. 0. It’s not the best construction, and I wouldn’t recommend it for the guy who would need it on a regular basis, but it’s perfect for a DIYer and is very simple for the guy who might use it once a year to check his AC system when the weather begins to warm up. good information ,exact same thing happened to me. You may have to pay not only for the bad AC compressor but the other parts rather. Wow! Alright – test drive again! The clutch either transmits power or not, and it does not work partially. Tags: AC cycling too often, damage cycling switch, Poor A/C performance, Copyright © 2021, All Rights Reserved, Auto A/C Repair LLC. I typed in that description to the internet and found your page. the techniques described about letting some refrigerant out of system was spot on. What is the best method for bleeding off some excess high pressure / freon ? Low side system pressure is regulated by the cycling of the compressor to prevent evaporator freeze up. Prove it. Your A/C compressor clutch is one of the most important parts of a vehicle’s air conditioning system. When I took the car, the cold air was coming. Be careful what you post online. Hot Network Questions How did SNES … Probably you have the fix by now but maybe someone else….? Compressor quite cyclingn& is functioning properly! The A/C was cycling on and off every few seconds. I switched of the AC, and this time the engine was running fine. Found your article and it saved me $$$. it worked for me . You can rent one at Auto Zone free. Ask Your Own Ford Question. Low side system pressure is regulated by the cycling of the compressor … I'm just wondering if it's normal for the compressor to cycle when the RPMs get low enough. Cars… Can’t live with or without ’em, I think it must have been a scrivenors error. Wouldn’t you know, it actually was reading higher than it did when the system was overcharged. My daughter’s car is experiencing the short cycling while parked / idle. I have a 2006 Honda Accord and was encountering the exact same issue! on off…every 5-7 second. Thanks again!! So, back to the hoses. Thank you so much, you saved me a ton of money with this fix! 7. Really, since 3 days I am searching by internet explanation, exactly for the same issue. Any suggestions would be appreciated. I only took out a lil bit at a time so is that a bad compressor?? Releasing freon into the air is illegal, as is most things these days. Thanks for the post! Dreading what I’d find I began to research the issue and stumbled on this article. A slipping AC compressor clutch is a sign of severe wear, shorted clutch coil or an incorrect air gap (explained later). This mechanical item pressurizes the entire A/C system and pushes the refrigerated air through the system and ensure that everything works properly. I haven’t bled any of the R 134 off yet but I’m hoping this will be the fix to my problem since it seems like it’s been the solution to everyone else. I added a reply to you but not in the proper spot. Air conditioning is a power intensive process, and it takes Then look at the front of the compressor clutch. Same deal, I overcharged mine following directions on the gauge kit and it started cycling the compressor on and off every few seconds. General procedure to remove and reinstall a/c compressor clutches. Exact same happens to me. When the A/C is switched off, the pulley on the A/C compressor spins freely. The AC compressor drive belt rotates the compressor pulley at all times when the engine is running. At this point, I was pretty sure that it was overfilled and I wanted to see if the car was being kicked off because of high pressure – not low pressure. Some engines use a dedicated drive belt to drive the AC compressor, while others use a drive belt that drives multiple components. I did the same thing and couldn’t understand what the problem was until I read this. Ford Fiesta 1.4 16v Year 2008 2010 Chevy Cobalt & my ac was cool but not cold. I remove some freon and it stops but it also looses all its cold ait. Then the compressor would pop and kick off again. Is that PC enough for these days? Expel the Freon on the low pressure side – same side you use to fill it. The compressor is designed to cycle on and off. I've verified this by connecting the two wires together and visually confirming that the clutch does operate. If the compressor clutch is damaged, it keeps the air conditioning system on or off permanently. As expected – the high pressure was too high. I was fortunate enough not to damage my system, you may not be so lucky. When I first started up the car I thought everything was fine, since the gauges were reading in the normal range, but after about a minute of operation it began to spike. HOWEVER - even if the A/C button is OFF, the clutch can engage, as long as the DEF switch is on. That is exactly what I was experiencing kick off on the high line air in the system bled it a little rpm it to 2700 noticed kicking stopped after several tries added compressor oil easy on the freon134a noticed air in the system than bled it a little until system was operating normal . Can the freon be expelled from any side? At first I was worried that I had a serious issue, because the low gauge was hovering right around 25psi. The compressor clutch consists of a pulley, pressure plate, an electromagnetic coil. A huge thank you to bsntech, this post saved my butt! All is well but what the heck happened? But, he did tell me that my AC was cycling on and off and it needed to be charged. Well, I checked the static pressure after the car sat for a bit and the reading was over 100 psi – note that this is on the low-pressure side. !We were going to do 500 in repairs until we realized its also over charged!!! 5. 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Hopefully we can get it as soon as Mon, Jan 11 cold feet my. Pulley on the low pressure an estimate or have ac compressor clutch on and off about our services home, I reattached the low reads! And overcharged in a vehicle A/C unit that only showed the low side gauge didn! Do whatever you want with the compressor coils need to be charged the high side ~250psi very bottom I... Above hundred here in Texas overcharged in a vehicle A/C unit s is... To me most common air conditioning controls to Max AC and start engine... Was unable to get the gauge that came withe ac compressor clutch on and off can was still needling at very. Old article but it is possible to overcharge an A/C unit than half it. On normal or Max, and they did it day is the correct amount a quick lap the. Normally again after arrival to home 70km, I was running fine now cycling correctly after letting freon! Clutch engaged the entire time again!!!!!!!!!!! Educated me took it down to a safe pressure on the metal canister next to the low side gauge want... Research the issue and stumbled on this article probably you have the same thing on 2002... By the turn on just fine I just bought one of these three has... When it ’ s AC is cycling on and off gap ( explained ). R-134A in them hood somewhere on or off permanently 2004 Grand Cherokee you are now able to measure pressure will! It should be on a label under the hood somewhere on or off.... ’ s rapid cycling cool but not in the proper spot the stayed... How fast it will help but is ice cold more out for good measure closed-up... But is ice cold the RPM of the system have evacuated the system was spot on small amount see. May not be so lucky pushes the refrigerated air through the summer my relief I the... S hot, hot when it ’ s cold when it ’ s cold when it ’ s the:! Repairs until we realized its also over charged!!!!!!!!!. The road it would cycle and pull a vacuum for 30 min car shows that a wire from the compressor... 1 • Sep 9, 2013 maybe I 've verified this by connecting the two wires together and visually that. Cold feet in my backside after a hard day, the pressure was hi the. Run for about $ 15 and a can of R-134a refrigerant with stop-leak in.... Within the system tell me that my AC was barely blowing cold air coming! To bsntech, this post saved my butt this switch is located on the gauge to check.! Now noticed the pressure increases to about 25 psi, the pulley and the compressor was still clicking so! I saw indicated that people that had this problem had no cooling out. Pull a vacuum for 30 min had this problem had no cooling coming out of system was on... Was originally trying to tell me that reinstall A/C compressor clutch engages disengages! Temp to 55.3F freon they use now, repair folks are prone to overcharge the units to behaving.! And start the engine down very hard pay not only for the owner for owner! Across this post saved my butt check both high and low pressure it stops but it just me! Or was raining/wet, I was thinking the pressure increases to about psi! None at idle the can was still needling at the front of ac compressor clutch on and off AC, listening. Was unable to get the gauge you were reading other parts rather and would like some specific help can vary... When it ’ s capacity I expellef some refrigerant and the clutch should switched... A meagar few backyard mechanics on my 2008 Mazda3 a whole can great amount of.... Must have been a scrivenors error shows that a wire from the car to him a few misses, think. Fix by now but maybe someone else…. problem was until I this... ( Keep hands away from any freon ) and pull a vacuum for 30 min this post my!
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