But first, know some facts about an AC clutch compressor. Does it still stay engaged? Investigation shows low side pressure high (No high side gauges) and when the car is on, the ac pulley is spinning. Something diabolical was happening to the clutch on my air conditioner compressor. Social. Initially the compressor engages normally and AC works as it should. As you require the AC to work perfectly, we are going to give you the steps you need to take during such a situation. Check your pressures of the A/C system, the low side pressure switch will disengage the compressor clutch if the low side pressure gets below 26-30 psi (depending on calibration). You can check if the refrigerant is too low when the high-pressure side’s pressure gauge registers a pressure lower than what is required. Automotive air conditioning system uses an electromagnetic clutch mechanism that engages the compressor to turn the AC unit. If so, then the clutch is worn. Search Auto AC Forum Archives. These three conditions will disable the clutch to engage the compressor if it senses that the compressor is low inrefrigerant, has excess in refrigerant or the compressor has insufficient oil. I would suggest taking the car into a good a/c shop to have the compressor looked at. 6 Common Car Battery Problems – Best Ways to Change Car’s Battery, How to Double Clutch in 6 Simple Steps (without Special Training), 6 Overwhelming Reasons Why Your Car Squeal When You Turn the Steering Wheel, How to Replace Lower Control Arm and Bushings Without the Added Cost on Labor, Take a closer look at the front of the clutch, At this time, the pulley and the clutch should be rotating. Now it won't work at all. My question is, is there anything else that can cause the a/c clutch to remain on. You can check the AC’s manual for the right operating pressure on this side. If your clutch is engaged and the system has enoug refrigerant, but the piping isn't getting cold and no cold air, then you may have a bum compressor that is not compressing the refrigerant enough, or a leak on the high pressure side that's not allowing it to pressurize. If the compressor is overcharged with refrigerant, the high-pressure side will register an abnormally high pressure reading. Once the canister is drained, unscrew the switch from the canister with a wrench. care-my-cars-how-to-use-an-OBD-II Scan Tool, When Should You Replace Power Steering Fluid. You can check your car’s AC manual for the correct pressure level. The center part (the clutch) should be engaged and should be spining along with the pulley. To disengage the clutch, a switch must be replaced. Now look at the pulley of the air conditioner compressor. I do have pressure on the high side, but I don't know how much. Answered in 3 minutes by: 4/10/2010. Forum Master ; Posts: 2,994; AC clutch not disengaging « on: Aug 09, 2010, 12:09:28 am » I charged up the AC system in my car yesterday after doing a complete overhaul of the system. Have only been able to find one pressure switch that seems to be coming off the high side just above the compressor. IF the compressor clutch will not disengage - (which is rather unusual) - perhaps it is engaged but it in reality should not be. Thanks in advance for the help. pushrod on . The clutch does not disengage while running, both on Normal or Max, and sweats a lot, but is ice cold. Once I got home I noticed the clutch wasn't engaging at all. This switch is located on the metal canister next to the compressor. When the clutch does not engage with the compressor, the pump will not be operable. I will try to check the pressure transducer tomorrow. Because the switch is a connection between the canister and the condenser, the refrigerant must be drained from the canister. The clutch disc is splined to the compressor shaft. It started by not cooling under 1.5k rpm but would cool in gear driving above. Customer Question. It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. This makes operating your car’s air conditioning more convenient and user-friendly. If it stays above this number the clutch won't disengage. GordDavey Senior Member. The mechanic has flushed the system and did everything he could think of when replacing an ac compressor. The clutch keeps the compressor activated, if it breaks, the compressor will not be able to receive the engine power anymore. Is the engine control ignition relay. A delay can cause serious damage to the air conditioning … It would not disengage. Such oil is also available on Amazon, like the Cool Bear A/C Compressor Oil or the ACDelco 15-118 Compressor Oil. A delay can cause serious damage to the air conditioning system and the engine. The clutch can be replaced without having to buy a new compressor. The car only has 22k miles, and I always run the A/C compressor, either with the DEF or A/C on, so it always gets used. The center part on the pulley of the A/C compressor will not spin when you have the air conditioner off or if there is a problem. Show More. Easy test, unplug the clutch. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. Too many variables for online diagnosis - recommend seeking *hands-on* assistance from qualified personnel. When this is activated, a current passes through the coil creating a very powerful electromagnetic force (EMF). Similarly, the AC Compressor Clutch engages and disengages the compressor of the air conditioner. The clutch either transmits power or not, and it does not work partially. With the AC on, you should see that clutch moving. The same refrigerant cycles through the system many times. Leaks allow moisture to invade the system as the coolant leaks. In that case, you'd verify by putting a high pressure gauge on and seeing what it's building (or not building). It is illegal to drain this into the air; it will have to be drained by a professional company. When this happens, there would be no refrigerant or coolant that will circulate within the AC system to cool the car. BUT, the ac relay is the off/on for the power. Within a 20 minute span, i realized the clutch never cycled off; it just stayed spinning. The AC compressor clutch is the first thing that moves every time you turn on your AC. A bad AC compressor clutch needs immediate fixing. When Should You Replace Power Steering Fluid? And what turns the ac relay off/on. The units … With the connector off of the compressor, the clutch still does not disengage. My clutch did not disengage when I was going to work yesterday. It seemed possessed! It may not be difficult to diagnose a clutch compressor’s “malfunctioning”. These come complete, including instructions. If you open the hood, the ac compressor is the furthest right thing that has a belt going to it. The general use of clutch in the car is to engage and disengage drive train to transmit the power. (adsbygoogle = window.adsbygoogle || []).push({}); Possible reasons why clutch is not engaging, Why is A/C Pressure Too High? In most modern cars, the compressor’s clutch relay is turned off and on by the low-pressure and high-pressure switches, and the compressor’ oil level through the fuse. My ac compressor clutch keeps engaging and disengaging and not blowing cold air, i just charged it - Answered by a verified Auto Mechanic. This EMF draws the coil towards the friction plate, engaging the pump rotor and consequently, runs the compressor. But there are only a few pieces to the entire AC system. From all indication you may have a bad control head. But, sure you can’t use your car’s air conditioning system when this happens. The AC compressor exhibited no unusual symptoms that would explain the locked clutch, there was no bearing failure, no unusual noise, no smoke, no fire. I could not change gears so luckily I pulled into a gas station and turned off the car, When I restarted the car the clutch was ok and after work on my way home it seemed ok. Is the clutch going bad? The clutch on the ac compressor continues to go bad. Can anyone help me, I purchased a A/C from AMA for my Suzuki sidekick 1600 EfI with power steering Part No 14404-4284 I am very pleased with the system it … Even a blockage in the refrigeration circuit can make the clutch not to engage. Sounds like either the a/c relay is bad or a/c compressor clutch is not disengaging. It is an ominous sign when the clutch engages but the compressor does not spin. Here, you can learn what to do during a situation like this. From the looks of it, the climate control head is commanding the compressor on all the time. 1 answer & 1 comment. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. Rafael Blanco said: ↑ Thanks Gord, both ends of the fuse have 0v and I even put a new fuse just to be sure. View Profile View Forum Posts Private Message View Blog Entries Member Join Date May 17th, 2003 … The clutch not disengaging wouldn't be effected by anything other than the air gap. Ron, ASE Certified Technician. AC compressor clutch not engaging Posted ... on cars in school we had some that would kick cold and the compressor kicks on then after a few seconds of cold air the compressor would disengage. January 22, 2019. The clutch not disengaging wouldn't be effected by anything other than the air gap. Either the gap isn't correct or you have some stray voltage trying to pull in the clutch. A/C compressors are difficult to work with because of the refrigerant stored inside. You will see that teh ac compressor clutch is always hot. I put the plug back on the pressure switch and made sure it was on there good. If you are sure that the system is overcharged, bleed the refrigerant slowly using the discharge valve located near the gauge. play with the plug aswell Save … I will be scraping the car in the next year and do not wish to have it fixed so is there a way to turn off … ac compressor clutch; Page 3 of 3 < Prev 1 2 3. Turned off the A/C and still have 12V at the compressor. ​If you experience your car’s air conditioning (AC) clutch compressor 1985 AC Compressor does not disengage. Sometimes I think all Subarus are Outbacks. One of the first signs which is really to recognize … Popular Answer . The clutch compressor is designed not to engage when something is wrong in the system. It seemed possessed! The compressor is typically engine driven via the accessory belt, and the clutch on the compressor is used to engage and disengage the compressor. Why should you not drive on a flat tire? The clutch has a friction plate located next to an electromagnetic coil. How to Use Car Scanner And Find The Best Ones. Removing the ac clutch fuse did not disengage it. The Low-Pressure Switch. Its reading 35psi on the low side and just staying there because the compressor clutch is not disengaging. Ac pulley clutch not disengaging. I would try swapping out the dash ECC first before digging into the ECM. This is controlled by the turn on and off switch of the air conditioner in the dashboard near the driver and passenger. The clutch compressor is an integral part of the AC system of your car, rendering this inoperable is a big inconvenience for the car’s passengers. Probably not much changed from '85 to '90. Air conditioners have sensors that determine the pressure and temperature of the refrigerant, starting and stopping the compressor by engaging or disengaging the clutch. Now it won't work at all. Find Causes and Solutions, ZeroR R-134a Refrigerant - Made in USA - 12oz Cans, How To Add Oil on AC System Using Simply an Oil Injector. If your actions do not deliver results, you may bring your car to a mechanic and let him do a thorough check-up of your AC system. Hi Eric, I have a 2004 Honda accord 4 cylinder 2.4l sedan. Anyone have any idea?? 2005 ford focus zx5. We offer full-service AC system repairs, from replacing worn parts to system recharges. An AC clutch compressor is a type of compressor that derives its power from the car engine’s flywheel. Either your ac relay is stuck on. The Consequences are Mind-blowing! The clutch on the compressor is what allows the pulley to engage and disengage from engine power so that the compressor is only turning when it needs to be. Higher Temperatures Than Normal In The Cabin. I could not change gears so luckily I pulled into a gas station and turned off the car, When I restarted the car the clutch was ok and after work on my way home it … If you turn the knob to A/C and the clutch doesn't engage and start spinning the compressor, tap on the clutch itself lightly with a screwdriver handle while the rig is running and the knob is on A/C and see if the clutch locks up. Your crown vic just like most cars has an AC clutch relay in the fusebox. Two types of high-pressure cutout switches. Had it for almost 2 years. If the clutch compressor doesn’t engage, there are more possibilities. This still did not allow the compressor clutch to cycle. I installed r134 while running the ac. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. I looked down at the clutch on the compressor, and noticed it was engaged. Theoretically, if an air conditioning system is low enough on refrigerant to disengage the compressor clutch, it’s too low to be recharged with a DIY kit. A dysfunctional AC compressor will not directly influence the engine but it can cause either parasitic draw when switched on or can potentially restrict crankshaft movement if the clutch is engaged but the compressor is seized which does not allow belt movement and causes slipping, burn and extreme wear and tear of the belt and pulleys. AC compressor not disengaging! Air conditioners have sensors that determine the pressure and temperature of the refrigerant, starting and stopping the compressor by engaging or disengaging the clutch. 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About an AC clutch not disengaging after i pulled the 12-volt supply wire to the compressor an store. System many times think of when replacing an AC compressor to cycle shows 12 VDC has the... That there is something wrong with the system when this is activated body of the compressor car and it! Cool in gear driving above screwed into the ECM the process of engaging and disengaging of compressor. ( Read 6810 times ) flyingbrick and make sure that the clutch either transmits power or,. Compressor ’ s air conditioning system when something does not work partially if fuse! Next time, better check these things occasionally to avoid problems: find more other to. N'T be effected by anything other than the air coming from the car is,... Stays engaged when i was mistaken, it will cause the A/C compressor stays engaged when was... Compressor stays engaged when i turn the A/C, the clutch either transmits power or,... 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Sight glass it affected the clutch the 12-volt supply wire to the pump rotor the... For 10-15 ac compressor clutch not disengaging, and then go bad a Forester, not an.! Sites and school newspapers a professional company can ’ t engage, there be. Pressure drop when the air conditioning system uses an electromagnetic clutch mechanism that engages when the clutch is inoperative of... Looked down at the compressor shaft engine control module single function switch interrupts function. While the AC compressor will turn and spark fire along with other of your vehicles ’ components should properly. Has been acting up over the last 6 months car gets chilled normally please visit http:.... Refrigerant 134A his work, please visit http: //adistortedperception.blogspot.com can ’ t use your car more user-friendly and.! Fan to run or not an automotive store 1/2 hour twice a week and then,... But, sure you can, unplug it you turn on and off switch of the conditioning... Care-My-Cars-How-To-Use-An-Obd-Ii Scan Tool, when should you Replace power Steering Fluid once the canister and refill the refrigerant a. General use of clutch in the dashboard near the gauge and convenient i will try to check the transducer. Very powerful electromagnetic force ( EMF ) made sure it was on there good not Outback... Shop to have the compressor with a clutch compressor is a Forester, an... Be coming off the high side, but while the AC is turned off the and! Pdc, then PDC to AC compressor clutch is engaging, pressure is dropping, and then,! Today utilize an electromagnetic clutch system to cool the car gets chilled normally compressor turn! Pull in the sight glass the off/on for the correct pressure level until the pressure drop when A/C! New compressor is approved by your AC ’ s engine is directly to. To AC compressor continued to turn even after i pulled the 12-volt supply to... Clutch relay in the off position A/C pressure too high repairs, from replacing worn parts system... But while the AC compressor clutch does not spin i popped the hood, the signal is still sent! Started by not cooling under 1.5k rpm but would cool in gear driving above be no refrigerant coolant... Mins of operation it disengages when the clutch on the metal canister next the! Sounds like either the gap is n't correct or you have some stray voltage trying to in. Compressor that derives its power from the canister … i looked down at the compressor looked.!, it will have to be drained by a professional company clutch, a switch must be replaced removing... Fuse controling the A/C clutch to engage and disengage drive train to transmit the power towards the friction material burn! Thread starter KK ; start date Feb 2, 2012 ; Sidebar Sidebar made sure it on...

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