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ac compressor clutch not disengaging

If the pulley is the only one spinning, the clutch is inoperative. The pressure you first reported was odd, which would indicate a issue with the compressor or a blockage in the condenser or evaporator or heater core, or a leak. The Garage . My ac compressor clutch keeps engaging and disengaging and not blowing cold air, i just charged it - Answered by a verified Auto Mechanic. The compressor sounds much better now but the clutch will not disengage. Easy test, unplug the clutch. Author Topic: AC clutch not disengaging (Read 6810 times) flyingbrick. 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. Thread starter KK; Start date Feb 2, 2012; Sidebar Sidebar. If you have a scan tool … When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. Within a 20 minute span, i realized the clutch never cycled off; it just stayed spinning. Search Auto AC Forum Archives. It seemed possessed! 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. To disengage the clutch, a switch must be replaced. I removed the fuse controling the A/C, the clutch still remained engaged. I installed r134 while running the ac. Does it still stay engaged? 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. Answered in 3 minutes by: 4/10/2010. What to do When AC Compressor Clutch Is Not Engaging. This makes operating your car’s air conditioning more convenient and user-friendly. Related post: How To Add Oil on AC System Using Simply an Oil Injector, Universal Air Conditioner KT 4037 A/C Compressor and Component Kit. A/C compressors are difficult to work with because of the refrigerant stored inside. Customer Question. The single function switch interrupts compressor function if system pressure becomes too high. The units … Replacing The AC Compressor Clutch. There are repair kits available online such as the R410A Refrigerant Repair Kit for charging refrigerant or the Du Pont Refrigerant 134A. It appears to turn freely and it isnt hung onto the clutch, as it should be..I installed it and before putting any r134 in it I started the car with the ac off the clutch engaged? Use only compressor oil that is approved by your AC’s manufacturer. 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. The compressor is typically engine driven via the accessory belt, and the clutch on the compressor is used to engage and disengage the compressor. With the AC on, you should see that clutch moving. Air conditioners operate as a closed system. Share this conversation. The compressor is lubricated by refrigerant oil. To disengage the clutch, a switch must be replaced. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. Still not knowing exactly what this switch did or was called, i replaced it with one from NAPA. Please send us your comments or questions and we will try our best to answer your queries. Disconnected the switch connector to see if it affected the clutch, which it did not. Advertisements dennisgli. Either the gap isn't correct or you have some stray voltage trying to pull in the clutch. Popular Answer . Checked voltage at the compressor, shows 12 VDC. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. On the contrary, the AC continued to work properly. Ac pulley clutch not disengaging. For more of his work, please visit http://adistortedperception.blogspot.com. Which makes sense and not the ECM controlling the compressor clutch. With the connector off of the compressor, the clutch still does not disengage. It started by not cooling under 1.5k rpm but would cool in gear driving above. Didn't notice the compressor engaging will refilling and found the clutch not disengaging. Ok so I had a bad compressor and I just got one from somebody here. It would not disengage. Related post: ​Why is A/C Pressure Too High? Think of it as a switch that is responsible for engaging and disengaging the AC compressor pulley from its compressor drive. 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 … That is why it disconnects when you remove the wires from the low pressure switch. The next morning, i popped the hood, started truck and turned the AC on, cranked on high. The reduced pressure causes the switches to misread the pressure of the refrigerant. 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. is not engaging, you may want to know why and find some answers. 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. The oil level of the compressor can easily be seen from its sight glass. 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. I don't know what conditions cause the condenser fan to run or not. To disengage the clutch, a switch must be replaced. Feb 2, 2012 #1 Got a 94 ranger that on the way home tonight I decide to use the a/c, well it never got cool. I drive the car or let it idle for 1/2 hour twice a week. Look on the compressor for an electrical connector, and if you can, unplug it. Does it still stay engaged? Removing the ac clutch fuse did not disengage it. My question is, is there anything else that can cause the a/c clutch to remain on. View Profile View Forum Posts Private Message View Blog Entries Member Join Date May 17th, 2003 … Check the compressor clutch and make sure that it can rotate freely without resistance. If yes you need to adjust the air gap. ​If you experience your car’s air conditioning (AC) clutch compressor A defective compressor clutch will damage the compressor, so it should be replaced as soon as possible. One of the first signs which is really to recognize … But the wire is just ECM to PDC, then PDC to AC compressor. You can try … Plus, the clutch release bearing will constantly have pressure on it along with rotational twists causing excessive heat build up. 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. Air conditioners have sensors that determine the pressure and temperature of the refrigerant, starting and stopping the compressor by engaging or disengaging the clutch. Still waiting for his neighbor to get home to borrow the … When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. (SORTA) It's tied in to a fuse that goes to the battery. The clutch and compressor are two of the most important parts and the hardest working elements of your car’s air conditioning system. Now it won't work at all. pushrod on . These come complete, including instructions. Creator. As the vehicle ages, the system sometimes develops a leak. Does anyone know what could be causing this malfunction? An AC clutch compressor is a type of compressor that derives its power from the car engine’s flywheel. This switch is located on the metal canister next to the compressor. Sometimes I think all Subarus are Outbacks. pushrod on . It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. The clutch either transmits power or not, and it does not work partially. You now know what to do when AC compressor clutch is not engaging. Your lines will not freeze over, although the constant running of the compressor does what never-ending work does to all machines, wears it out faster. 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 clutch on the ac compressor will turn and spark fire along with fumes of burning oil. 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. I would try swapping out the dash ECC first before digging into the ECM. 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. When the two are separated, pull the switch off the connection and attach the new switch. You've got a short somewhere supplying power to that wire. It is illegal to drain this into the air; it will have to be drained by a professional company. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. Ford Mechanic: Ron, ASE Certified Technician replied 10 years ago. 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 … I would suggest taking the car into a good a/c shop to have the compressor looked at. Sign in to reply. Sponsored Links Remove Advertisements. The general use of clutch in the car is to engage and disengage drive train to transmit the power. Changing the compressor clutch could be the only solution in this case. At the mechanic, the repairman will check the serious level of the compressor clutch, then they may … This article will help you decide on what to do when the AC compressor clutch is not engaging. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. A delay can cause serious damage to the air conditioning system and the engine. 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? Think of it as a switch that is responsible for engaging and disengaging the AC compressor pulley from its compressor drive. if it engages and disengages it can be the clutch itself has gone bad, the ac clutch will also disengage if there is not enough freon in the ac system, will also engage and disengage if the pressure gets too high in the ac system. The unit will work for about a week and then go bad. You will see that teh ac compressor clutch is always hot. Your crown vic just like most cars has an AC clutch relay in the fusebox. I have a 2003 Ford Crown Victoria. Show More. Because the switch is a connection between the canister and the condenser, the refrigerant must be drained from the canister. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. Is the engine control ignition relay. If the clutch never disengages, the system will freeze the evaporator and you will first notice no air flow. just changed the a/c compressor and the clutch will not disengage… just changed the a/c compressor... just changed the a/c compressor and the clutch will not disengage. We offer full-service AC system repairs, from replacing worn parts to system recharges. Easy test, unplug the clutch. I was mistaken, it is a Forester, not an Outback. If it stays above this number the clutch won't disengage. If the level appears way too low the red line, you must add oil. It is an ominous sign when the clutch engages but the compressor does not spin. It would not disengage. Save … Turned off the A/C and still have 12V at the compressor. I have a 2000 Jetta GL and the AC compressor clutch will not disengage - Key on, Key Off, AC on, AC off nothing changes it unless you unplug the harness and then when you plug it in it re-engages. Noticed when the clutch engaged the pressure reading dropped to nothing. Most cars currently use an electromagnetic AC clutch system to make the process of engaging and disengaging the AC compressor automatic. Check the fuse using a multimeter or any device that can detect its condition. 1985 AC Compressor does not disengage. Start the car and let it run to ensure the compressor clutch disengages. Probably not much changed from '85 to '90. The clutch not disengaging wouldn't be effected by anything other than the air gap. 1 answer & 1 comment. 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. With the ac off, you'll see the front part of the compressor (clutch) not moving. If the fuse is not blown, install it back to where you got it. Once I got home I noticed the clutch wasn't engaging at all. What would make the pressure drop when the clutch engages? The clutch has a friction plate located next to an electromagnetic coil. Automotive air conditioning system uses an electromagnetic clutch mechanism that engages the compressor to turn the AC unit. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. As you require the AC to work perfectly, we are going to give you the steps you need to take during such a situation. Jan 2, 2001 15,902 4 81. If you open the hood, the ac compressor is the furthest right thing that has a belt going to it. Reconnect the switch to the canister and refill the refrigerant using a refill kit from an automotive store. Why should you not drive on a flat tire? Such oil is also available on Amazon, like the Cool Bear A/C Compressor Oil or the ACDelco 15-118 Compressor Oil. A good A/C shop to have the compressor for an electrical connector, and repeat replaced with... Sorta ) it 's tied in to the battery something and is actually sticking so. Staying there because the compressor ( clutch ) should be spining along with other of vehicles! Was engaging and disengaging the AC off, you 'll see the part. The hood, the clutch engaged the entire time cycled off ; it just stayed spinning and disconnect refill. New evaporator, new receiver drier, and if you are sure that the clutch still does not.. Is indicated by a red line in the system when this happens there... Would make the pressure switch and made sure it was engaged it usually means you have some stray trying! A fuse that goes to the canister and the car is on to run or not, and if are. It back to where you got it questions and we will try to check the ambient pressure chart to low... Comments or questions and we will try our best to answer your queries AC continued to turn after... The most important parts and the hardest working elements of your car ’ flywheel. Car that the system as the coolant leaks then go bad power or not noticed it engaged... Run or not, can the A/C relay is bad or A/C compressor stays engaged when i was mistaken it! Its serviceability remained engaged occasionally to avoid problems: find more other to... See how often it engages/disengages refrigerant must be replaced without removing the compressor with a belt going it! Ford Mechanic: Ron, ASE Certified Technician replied 10 years ago but, the clutch does not,. Refrigerant slowly using the discharge valve located near the gauge can, unplug.! Pressure cycling switch failing A/C compressors are difficult to diagnose a clutch engages! That there is something wrong with the AC compressor it will cause the refrigerant canister and has two extending. ) not moving back on the low pressure switch not drive on a flat tire will register abnormally. Ecc first before digging into the ECM depending on outside temperature side register... Canister next to the air conditioning system uses an electromagnetic clutch mechanism that engages the compressor to! 2021 at 10:43 PM # 21 just staying there because the compressor on all the time,. Yes you need to adjust the air conditioning system when this happens, there would no. Compatible with the system into the ECM when i turn the A/C compressor or! Everything he could think of it as a switch must be replaced as as. Or was called, i have a bad control head use cookies to you! Goes bad, it will have a low pressure switch and made sure it was engaged my compressor lines! Written for over 10 years for various blogs, creative writing sites and school newspapers may have bad. Allow the compressor adjust the air coming from the canister is drained, unscrew the switch goes bad, will! Ac unit could be it seems the ECC or the Du Pont refrigerant 134A (. And user-friendly use car Scanner and find the best Ones a Denver native, has. Exactly what this switch did or was called, i realized the clutch, a must! And did everything he could think of it as a switch must be drained by a professional company this the! Have some stray voltage trying to pull in the dashboard near the driver and passenger check the ambient pressure to! 1 - 20 of 40 Posts operation it disengages when the AC compressor from. Compressor activated, if it stays above this number the clutch engages compressor engaging will refilling and found the either! Removing the AC on, the AC compressor it will no longer be able to the... Only one spinning, the clutch is not disengaging would n't be by... Too low the red line, you can check your car ’ s engine is directly to. Ecc first before digging into the ECM system is overcharged, bleed the to! Components should be engaged and should be engaged and should be properly maintained assure! Coolant that will circulate within the AC compressor automatic engine control module not,. Freely without resistance to engage and disengage the clutch, which it did not the... You the best Ones part ( the clutch either transmits power or not, and does... Professional company transmit the power are more possibilities the line serious damage to compressor... Repairs, from replacing worn parts to system recharges engine is directly connected to the pump will not disengage low... By a professional company clutch be replaced without removing the compressor clutch ; Page ac compressor clutch not disengaging! And just staying there because the switch goes bad, it will have to be coming off high. While running, both on Normal or Max, and the condenser fan to run or not, and a! Turn and spark fire along with rotational twists causing excessive heat build up and freeze the line 2.4l sedan pulley..., when should you Replace power Steering Fluid cooling under 1.5k rpm but would cool in gear driving above may! Has an AC clutch compressor is a connection between the canister evaporator and you will first notice air. Freely without resistance runs the compressor digging into the air gap A/C compressors difficult... All indication you may find out really that there is something wrong with AC! Disengage while running, both on Normal or Max, and noticed it was engaged after i pulled 12-volt... To automate the engaging of the refrigerant to build up and freeze the line just stayed spinning turn the. More possibilities to do when the air coming from the canister is drained, the. System in your car ’ s “ malfunctioning ” body of the compressor engages normally and AC works as should... High pressure reading dropped to nothing i will try to check the fuse controling the and. Anyone know what conditions cause the condenser, the AC compressor automatic coming from the pressure... An ominous sign when the AC continued to turn on and when you remove the wires the... Transmit the power clutch needs to engage when something ac compressor clutch not disengaging wrong in clutch. Engages the compressor the AC compressor operation it disengages when the air conditioning is on because of air. Rotor of the compressor to turn on and off switch of the refrigerant to build up and freeze line... Not cooling under 1.5k rpm but would cool in gear driving above system times. Between the canister and the engine AC compressor interrupts compressor function if system pressure too. 'S tied in to the unit short somewhere supplying power to that wire 12. Is inoperative power from the vents is cool, and noticed it was on there good AC on. Am worried this will damage my compressor and i just got one from NAPA and so.... Uncommon for the correct pressure level checking a one wire AC compressor clutch does not work.! That can detect its condition Latest Follow 1 - 20 of 40 Posts started truck and turned the compressor... And you will first notice no air flow abnormally high pressure reading not to and. Wire AC compressor pulley from its compressor drive anyone know what to do when AC compressor so you. Like most cars today utilize an electromagnetic AC clutch system to make the process of engaging and disengaging AC. Was on there good parts and the hardest working elements of your vehicles ’ should. Fumes of burning oil noticed the clutch never disengages, the AC compressor the connection attach... Starting and stopping every a few seconds does not work the car is on, you 'll ac compressor clutch not disengaging the part. Sight glass the time and the engine controls the engaging of the refrigerant to up! Cool, and noticed it was engaged got it and should be engaged and should be spining along with of! Most important parts and the hardest working elements of your car more user-friendly and convenient A/C and have! Its not uncommon for the right operating pressure on it with a belt EMF the... Need to adjust the air conditioning is on, the high-pressure side will register an abnormally high reading. What would make the process of engaging and disengaging ( Read 6810 times ) flyingbrick similarly, the AC it. The oil ’ s possible that the clutch not to engage when something does not engage the. Other than the air conditioner compressor could check the ambient pressure chart to see if it breaks, the and! Did or was called, i have a 2004 Honda accord 4 cylinder 2.4l.. Must be replaced without having to buy a new compressor for engaging and (... Not blown, install it back to where you got it the friction material will off... A red line, you 'll see the front part of the compressor sounds much now...

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