Burnt Fuse/Bad Relay. Thanks for posting this, it has educated me. I’m certainly no expert but I’ve found this article is helping a great amount of people fix their issue. Depends which side of the gauge you were reading. I have. 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. Again, this is normal operation.If you do find that your car’s air conditioner compressor i… Thanks! thanks guys! Suddenly, the compressor began to kick on-and-off rapidly and my heart sank. Cars… Can’t live with or without ’em, I think it must have been a scrivenors error. When low-side pressure decreases to about 25 psi, the pressure cycling switch opens the clutch’s coil circuit to disengage it. The ac was barely blowing cold air before the recharge and now it blows none. Once again, many thanks for the owner for the post! 4.0 out of 5 stars 42. Releasing freon into the air is illegal, as is most things these days. Thank you, it worked like a champ on my 2004 Grand Cherokee. Alright – test drive again! The Honda Civics can hold up to 22 ounces of R-134a in them. At first I was worried that I had a serious issue, because the low gauge was hovering right around 25psi. Share this conversation. Problem fixed – no more squeek! The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. The A/C shop said unplugging the unit would be ok, but they do not have to grovel around under the car drilling out seized under tray fixings etc to get to it. I think I overcharged my system but only have the means to remove the coolant from the low pressure side? When the A/C is activated, the compressor clutch transfers power from the engine’s crankshaft to the pulley mounted on the A/C compressor. I knew I was running a little low, and ended up adding almost a whole can. My father charged my a/c yesterday and it started cycling while it was charging. The OP is the best I’ve seen for person-splaining conditions and ramifications for vehicular AC compromisation. Thank you for this post! I did the same thing and couldn’t understand what the problem was until I read this. In this article, you will learn what you can do during such a situation. When the pressure increases to about 47 psi, the switch closes the circuit, causing the clutch to engage the compressor. Is it time to replace the compressor clutch on my 2008 Mazda3? I would welcome any ideas and suggestions. Everywhere I turned, people said that if the compressor was cycling on and off quickly, that meant the compressor was low on freon. “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. The cheap gauge showed that I was on the low end of operating pressure, so I decided to add a bit more, then the compressor began rapidly cycling, and when it was engaged the engine was almost stalling at idle. As expected – the high pressure was too high. We will see, as this is just the first day and the a/c boys are still here. This saved me so much time, money and headache. How does an A/C Compressor Clutch Work? Then the compressor would pop and kick off again. When your car’s AC system is turned on, the AC compressor clutch in your AC system will spring into action and begin to transfer power from your engine to the pulley that’s attached to your AC compressor. Discussion Starter • #1 • Sep 9, 2013. I have a 2005 Honda Pilot. I have a 2006 Honda Accord and was encountering the exact same issue! Solution: Refrigerant leaks can be dangerous, call a local HVAC company to find and fix the leak. I have been googling about this same issuse i had encounterd with my 2005 honda crv but after landing on this post i got this clinking and rattling issue solved thanks for sharing it helped me great cheersssss. It appears that it too was overcharged as the a/c boys are here today. I'm trying to understand the operation of the AC system on my car so I can bring it back to life. Hot Network Questions How did SNES … 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! !We were going to do 500 in repairs until we realized its also over charged!!! Turns out there is a second belt – an accessory belt – that controls the A/C compressor. Tried Recharging A/C and hear a hissing sound. I am now thinking the compressor coils need to be cleaned. Without the cycling switch to activate the compressor’s clutch, the AC system will not be pressurized correctly, and the system will be unable to produce any cold air as a result. Same deal, I overcharged mine following directions on the gauge kit and it started cycling the compressor on and off every few seconds. I’ve got the same thing going on with my car and come to the same conclusions of undercharging or overcharging so I’ll hit some R134 and it works okay for a little while but for some reason the pressure will build back up over time and I have to repeat those steps, Do you bleed it from the Low port (while running the car) or the HIGH port (when the car is turned off?). After all, we aren’t factories and such. Didn’t even make it very far and the compressor started kicking on and off again! Found your article and it saved me $$$. But, he did tell me that my AC was cycling on and off and it needed to be charged. Show Less. If you get that the air conditioning (AC) compressor clutch is not engaging in your car, you might need to get some answers. My AC is always spending even if the AC is off does the AC always going to be running because I never had a clutch engage is this supposed to work that way with the AC compressor always running can you please give me a little bit inside on what's really going on because that the air is not circulating would be cold . Im dealing with the same thing. BTW. Show More. 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). It is normal for a vehicles system to cycle the compressor to prevent the internal pressure from exceeding certain maximum pressures within the system. As deal, I requested the seller to check the gas system, and they did it. Thanks again!! OK I knew, something is with AC. I was afraid I overfilled it – because the car was originally trying to cool before putting any R-134a into it. $20.99 $ 20. There is a fine line between undercharged and overcharged in a vehicle a/c unit that only holds 28 oz. I turned the A/C off and stopped putting R-134a into it becuase the compressor cycling was almost causing the car to die from the load it was putting on the engine. A huge thank you to bsntech, this post saved my butt! But, I explained to him how it was working fine – and somewhat cooling – before putting any refrigerant in – then it started kicking on and off after adding 3/4 a can in. I then got my temp prob out and found the temp to 55.3F. Just turn the A/C on and you should be good. The compressor clutch kicks on and off randomly during the driving. Some of the freon was taken out of the vehicle and the guy said there most likely was some air in the line that wasn’t helping things. Thank you again for sharing! Thanks buddy! Design by Final Web Design. Probably you have the fix by now but maybe someone else….? By the time I was done, my low side reads at ~35psi, and the high side ~250psi. One side goes up and the other goes down while the AC is running. 0. My daughter’s car is experiencing the short cycling while parked / idle. good information ,exact same thing happened to me. I checked the Freon level and it seems fine. Great post: very informative. When there’s a problem with the compressor clutch, … Then, when your compressor is off, the pressure will rise again and it will turn back on. 7. I’ve been reading through this entire thread and I’m thinking I’m experiencing the same issue as everyone else. Thanks for the info and confirmation . There is some very little cold coming out of vents at highway speed / hi rpm but none at idle. After taking some out, the compressor stopped kicking on and off – and the high pressure then stayed fairly stable between 325 and 350 psi. I was fortunate enough not to damage my system, you may not be so lucky. That power is what makes it possible for your AC system to start running so that it can cool the interior of your car off in a hurry. I expellef some refrigerant and the compressor worked normally again. So, down to the local automotive store. 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. He got that replaced and also replaced the serpentine belt while he was at it. My car has 167000 miles. Thank you for posting this info!!! Then began cycling on and off, run for about 10 secs or so, then shut off, then back on. Get it as soon as Mon, Jan 11. the techniques described about letting some refrigerant out of system was spot on. i have an 05′ ford & i did the “do it yourself” freon thing & had the same thing happen & was dreading a $1k fix..thanks so much for posting.. Had a new trane unit installed in my house. The wiring diagram for my car shows that a wire from the AC switch turns the compressor clutch on and off. A pressure cycling switch is electrically connected in series with the compressor electromagnetic clutch. Turn the air conditioning controls to MAX AC and start the engine. AC system relays. After arrival to home, I checked the situation, open the hood, and listening the kick. D find I began adding another can ramifications for vehicular AC compromisation leave the clutch to! No longer be able to diagnose the symptoms of bad AC compressor clutch directions on the cooling! Canister next to the shop for diagnostic clicking on-and-off so I kept bleeding the line until the high /! 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