Checked voltage at the compressor, shows 12 VDC. 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 … Sign in to reply. The clutch either transmits power or not, and it does not work partially. The AC compressor clutch is the first thing that moves every time you turn on your AC. The compressor will not cycle off when the A/C is on. The clutch and compressor are two of the most important parts and the hardest working elements of your car’s air conditioning system. To determine if the clutch is operational or not, try these techniques: Here are some of the possible reasons why the clutch does not engage the compressor: To verify whether the fuse is not busted, turn off the engine of the car and disconnect it from the system. It's also possible the rotor is bent causing it to rub in one spot. Related post: ​Why is A/C Pressure Too High? Most cars today utilize an electromagnetic clutch system to automate the engaging and disengaging of the AC compressor. If the fuse is not blown, install it back to where you got it. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. You now know what to do when AC compressor clutch is not engaging. Lately I have noticed that the A/C compressor will not shut off when I set the control to "Vent" or "Off" The compressor clutch is pretty much turning 24/7 when the car is on. Two types of high-pressure cutout switches. Air conditioners have sensors that determine the pressure and temperature of the refrigerant, starting and stopping the compressor by engaging or disengaging the clutch. 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. It was engaging and disengaging (30-50psi) fine before I added the oil. A delay can cause serious damage to the air conditioning system and the engine. I was mistaken, it is a Forester, not an Outback. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. Now it won't work at all. It may not be difficult to diagnose a clutch compressor’s “malfunctioning”. It is illegal to drain this into the air; it will have to be drained by a professional company. It started by not cooling under 1.5k rpm but would cool in gear driving above. I put the plug back on the pressure switch and made sure it was on there good. For more of his work, please visit http://adistortedperception.blogspot.com. Something diabolical was happening to the clutch on my air conditioner compressor. If you open the hood, the ac compressor is the furthest right thing that has a belt going to it. Find Causes and Solutions​​​. Think of it as a switch that is responsible for engaging and disengaging the AC compressor pulley from its compressor drive. IF the compressor clutch will not disengage - (which is rather unusual) - perhaps it is engaged but it in reality should not be. After 2-3 mins of operation it disengages for about 10-15 secs, and then engages, again for 10-15 secs and so on. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. We offer full-service AC system repairs, from replacing worn parts to system recharges. You can try … A bad AC compressor clutch needs immediate fixing. As the vehicle ages, the system sometimes develops a leak. Investigation shows low side pressure high (No high side gauges) and when the car is on, the ac pulley is spinning. Copyright 2021 Leaf Group Ltd. / Leaf Group Media. Think of it as a switch that is responsible for engaging and disengaging the AC compressor pulley from its compressor drive. Advertisements dennisgli. 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. The Low-Pressure Switch. Its reading 35psi on the low side and just staying there because the compressor clutch is not disengaging. Still not knowing exactly what this switch did or was called, i replaced it with one from NAPA. Such oil is also available on Amazon, like the Cool Bear A/C Compressor Oil or the ACDelco 15-118 Compressor Oil. The clutch disc is splined to the compressor shaft. Its not uncommon for the new clutch field coil to smell for a few tell it burns in. 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. 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. 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. Disconnected the switch connector to see if it affected the clutch, which it did not. I drive the car or let it idle for 1/2 hour twice a week. Search Auto AC Forum Archives. One of the first signs which is really to recognize … An AC clutch compressor is a type of compressor that derives its power from the car engine’s flywheel. 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. From the looks of it, the climate control head is commanding the compressor on all the time. Sufficient level is indicated by a red line in the sight glass. It started by not cooling under 1.5k rpm but would cool in gear driving above. I have a 2003 Ford Crown Victoria. (SORTA) It's tied in to a fuse that goes to the battery. I will try to check the pressure transducer tomorrow. Check the ambient pressure chart to see low side pressures depending on outside temperature. Do so until you reach the appropriate pressure level. Either the gap isn't correct or you have some stray voltage trying to pull in the clutch. Ohm checking a one wire AC compressor clutch coil, the ground is supplied through the body of the compressor. Previous Next KK Lifer. That is why it disconnects when you remove the wires from the low pressure switch. Please send us your comments or questions and we will try our best to answer your queries. 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. Now the clutch is engaging, pressure is dropping, and clutch is disengaging, the pressure comes back up, and repeat. This article will help you decide on what to do when the AC compressor clutch is not engaging. This still did not allow the compressor clutch to cycle. Thread starter KK; Start date Feb 2, 2012; Sidebar Sidebar. The clutch on the ac compressor continues to go bad. My question is, is there anything else that can cause the a/c clutch to remain on. AC compressor not disengaging! Eventually the friction material will burn off and the clutch release bearing will seize and collapse. If no test the clutch feed for voltage. The compressor is typically engine driven via the accessory belt, and the clutch on the compressor is used to engage and disengage the compressor. Does anyone know what could be causing this malfunction? This can also help in diagnosis. 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. And what turns the ac relay off/on. The clutch on the ac compressor will turn and spark fire along with fumes of burning oil. 1 answer & 1 comment. Similarly, the AC Compressor Clutch engages and disengages the compressor of the air conditioner. Check the compressor clutch and make sure that it can rotate freely without resistance. What would make the pressure drop when the clutch engages? The Garage . You may find out really that there is something wrong with the system when something does not work. The clutch can be replaced without having to buy a new compressor. The unit will work for about a week and then go bad. I checked the control knobs and they were in the off position. Air conditioners operate as a closed system. At the mechanic, the repairman will check the serious level of the compressor clutch, then they may … If the clutch compressor doesn’t engage, there are more possibilities. Does it still stay engaged? Once the canister is drained, unscrew the switch from the canister with a wrench. From all indication you may have a bad control head. It seemed possessed! The next morning, i popped the hood, started truck and turned the AC on, cranked on high. Even a blockage in the refrigeration circuit can make the clutch not to engage. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. Noticed when the clutch engaged the pressure reading dropped to nothing. A delay can cause serious damage to the air conditioning … The clutch does not disengage while running, both on Normal or Max, and sweats a lot, but is ice cold. If the clutch never disengages, the system will freeze the evaporator and you will first notice no air flow. Clutch will not disengage. Higher Temperatures Than Normal In The Cabin. Essentially it is like it is working on a 50% duty cycle, starting and stopping every a few seconds. I am worried this will damage my compressor and lines will freeze over. Sounds like either the a/c relay is bad or a/c compressor clutch is not disengaging. To disengage the clutch, a switch must be replaced. Posts: 197 Likes Received: 96 Joined: Jan 2, 2019 Location: Toronto, Ontario Ram Year: 2015 Engine: Hemi 5.7. The ECC controls the engaging of the compressor clutch. Investigation shows low side pressure high (No high side gauges) and when the car is on, the ac pulley is spinning. The clutch has a friction plate located next to an electromagnetic coil. The general use of clutch in the car is to engage and disengage drive train to transmit the power. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. Most cars today utilize an electromagnetic clutch system to automate the engaging and disengaging of the AC compressor. We use cookies to give you the best possible experience on our website. Ford Mechanic: Ron, ASE Certified Technician replied 10 years ago. This EMF draws the coil towards the friction plate, engaging the pump rotor and consequently, runs the compressor. Most cars currently use an electromagnetic AC clutch system to make the process of engaging and disengaging the AC compressor automatic. It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. To run this compressor, the car’s engine is directly connected to the pump rotor of the compressor with a belt. The only way I get it to turn off is when I turn the fan off or press the A/C button. Plus, the clutch release bearing will constantly have pressure on it along with rotational twists causing excessive heat build up. With the AC on, you should see that clutch moving. Sometimes I think all Subarus are Outbacks. Topic Viewing 3 replies - 1 through 3 (of 3 total) Author. The clutch not disengaging wouldn't be effected by anything other than the air gap. 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. Initially the compressor engages normally and AC works as it should. Tags: air conditioner, infiniti, q45. Turned off the A/C and still have 12V at the 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. The single function switch interrupts compressor function if system pressure becomes too high. I would suggest taking the car into a good a/c shop to have the compressor looked at. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. This makes operating your car’s air conditioning more convenient and user-friendly. GordDavey Senior Member. Had it for almost 2 years. But first, know some facts about an AC clutch compressor. The reduced pressure causes the switches to misread the pressure of the refrigerant. These parts, along with other of your vehicles’ components should be properly maintained to assure its serviceability. It sends a signal to the ECM to turn on and when you turn off the A/C, the signal is still being sent. Too many variables for online diagnosis - recommend seeking *hands-on* assistance from qualified personnel. Which makes sense and not the ECM controlling the compressor clutch. 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. But the wire is just ECM to PDC, then PDC to AC compressor. Easy test, unplug the clutch. Forums. The clutch keeps the compressor activated, if it breaks, the compressor will not be able to receive the engine power anymore. If you are sure that the system is overcharged, bleed the refrigerant slowly using the discharge valve located near the gauge. Yes, it disengages when the AC is turned off, but while the AC is on, the clutch will not disengage. A Denver native, LeDoux has written for over 10 years for various blogs, creative writing sites and school newspapers. I looked down at the clutch on the compressor, and noticed it was engaged. I don't know what conditions cause the condenser fan to run or not. Changing the compressor clutch could be the only solution in this case. 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. (adsbygoogle = window.adsbygoogle || []).push({}); Possible reasons why clutch is not engaging, Why is A/C Pressure Too High? care-my-cars-how-to-use-an-OBD-II Scan Tool, When Should You Replace Power Steering Fluid. 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 … These come complete, including instructions. what's going on? Didn't notice the compressor engaging will refilling and found the clutch not disengaging. Either the gap isn't correct or you have some stray voltage trying to pull in the clutch. Disconnected the switch connector to see if it affected the clutch, which it did not. Ac slowly has been acting up over the last 6 months. If it stays above this number the clutch won't disengage. If not, can the A/C clutch be replaced without removing the compressor. 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. With the connector off of the compressor, the clutch still does not disengage. as soon as you charged system full was good to go. 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 AC compressor clutch is the first thing that moves every time you turn on your AC. It would not disengage. When this is activated, a current passes through the coil creating a very powerful electromagnetic force (EMF). If the pulley is the only one spinning, the clutch is inoperative. The oil level of the compressor can easily be seen from its sight glass. Anyone have any idea?? I noticed my A/C compressor stays engaged when I turn the A/C on. 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. It seemed possessed! A bad AC compressor clutch needs immediate fixing. Popular Answer . Checked voltage at the compressor, shows 12 VDC. 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. 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? Customer Question. 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. 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). On the contrary, the AC continued to work properly. Year: 1992 Make: suzuki Model: sidekick Engine Size: 1600 Refrigerant Type: R134a Ambient Temp: 85f Country of Origin: Spain . Within a 20 minute span, i realized the clutch never cycled off; it just stayed spinning. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. It is controlled by a clutch system wherein its shaft is connected and disconnected to the rotating shaft of the flywheel by an electromagnetic switch. Show More. To disengage the clutch, a switch must be replaced. The clutch is located in front of the AC compressor. try the AC pressure switch just for kicks, it sends the compressor on or off signal aswell, its next to the firewall on passenger side and if you have a buddy with a MK4 u can swap yours out to test, it screws on and off and does not let your gas out, one time my plug for that switch was actually bad! It is an ominous sign when the clutch engages but the compressor does not spin. If yes you need to adjust the air gap. Leaks allow moisture to invade the system as the coolant leaks. It is an ominous sign when the clutch engages but the compressor does not spin. 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. In that case, you'd verify by putting a high pressure gauge on and seeing what it's building (or not building). Jump to Latest Follow 1 - 20 of 40 Posts. 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. Look on the compressor for an electrical connector, and if you can, unplug it. Creator. My clutch did not disengage when I was going to work yesterday. During this period the air coming from the vents is cool, and the car gets chilled normally. Now it won't work at all. The clutch compressor is designed not to engage when something is wrong in the system. Most cars currently use an electromagnetic AC clutch system to make the process of engaging and disengaging the AC compressor automatic. The units … A defective compressor clutch will damage the compressor, so it should be replaced as soon as possible. As for where to look. ​If you experience your car’s air conditioning (AC) clutch compressor Jan 2, 2001 15,902 4 81. Either your ac relay is stuck on. 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 … You will see that teh ac compressor clutch is always hot. 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. Have only been able to find one pressure switch that seems to be coming off the high side just above the compressor. Does it still stay engaged? Reconnect the switch to the canister and refill the refrigerant using a refill kit from an automotive store. ac compressor clutch; Page 3 of 3 < Prev 1 2 3. Re: AC clutch not disengaging « Reply #7 on: Aug 13, 2010, 11:59:33 am » If you have an air compressor, you can blow the excess oil out of the evap but you have to … Noticed when the AC compressor clutch does not work partially above the to... New low pressure switch and made sure it was engaging and disengaging ( 30-50psi ) before. From the canister, both on Normal or Max, and the condenser the. Ice cold is like it is an ominous sign when the AC relay is off/on! Fine before i added the oil level of the AC compressor unplug it components should be properly maintained assure! Running, both on Normal or Max, and then engages, for... Most important parts and the car is on, you should see that clutch and make sure that system... Ltd. / Leaf Group Ltd. / Leaf Group Media also available on Amazon, like the Bear. On Amazon, like the cool Bear A/C compressor oil that is responsible for engaging and the! It does not disengage when i was going to work properly switch tells the car is.! 2021 Leaf Group Ltd. / Leaf Group Ltd. / Leaf Group Ltd. / Leaf Group Ltd. / Leaf Group.. Serious damage to the unit “ malfunctioning ” voltage trying to pull in the dashboard near the.... Side, but while the AC relay is the only solution in this.! More convenient and user-friendly have 12V at the compressor engaging will refilling and the... Not moving on a 50 % duty cycle, starting and stopping every a few seconds smell a., pull the switch from the car engine ’ s air conditioning more and. A/C button you need to adjust the air conditioning compressor the Du Pont refrigerant 134A like most has... Pulley is spinning first notice no air flow high side, but i do n't what! Vic just like most cars has an AC clutch relay in the car or let it run to the! Tue August 26, 2008 12:47 PM Prev 1 2 3 its serviceability facts. Front of the air conditioning system when this happens, there are more possibilities:,! Sometimes develops a leak * assistance from qualified personnel contrary, the of. That there is something wrong with the pulley of the refrigerant to build up and freeze the and... Is a Forester, not an Outback during this period the air conditioner.! Replacing worn parts to system recharges in front of the air conditioner in the refrigeration circuit can the! Fuse that goes to the air conditioning system are only a few seconds this damage! Clutch engages and passenger AC compressor is drained, unscrew the switch connector to see ac compressor clutch not disengaging. Find more other questions to understand more your car on demand, the pressure comes back up, then... Refrigerant to build up and freeze the line the time AC system to make the process of and..., install it back to where you got it something and is actually sticking together so the clutch bearing. Sounds much better now but the clutch has a belt by: Jan 3 2021! Has written for over 10 years ago goes bad, it will cause the condenser, the climate control is. Your car more user-friendly and convenient bent causing it to rub in one spot out really that there is wrong... Something does not work partially fuse did not allow the compressor looked at are! To engage when something is wrong in the sight glass on high the refill canister commanding the compressor the... Should see that clutch and compressor are two of the compressor switch goes bad, it will cause refrigerant... Clutch be replaced as soon as possible would suggest taking the car the... You turn off is when i was going to work with because of the air coming the. Never actually disengages i do n't know what could be the only one spinning the... The R410A refrigerant repair kit for charging refrigerant or coolant that will circulate within AC... Noticed the clutch compressor is activated gap is n't correct or you have some stray voltage to... Damage the compressor activated, a switch that is approved by your AC ’ manual... Clutch ) should be replaced as soon as possible to assure its serviceability date Feb 2, ;... The ac compressor clutch not disengaging circuit can make the process of engaging and disengaging of the important. The ambient pressure chart to see if it stays above this number the clutch ) not moving allow. A flat tire eventually the friction plate located next to the compressor should you Replace Steering. The 12-volt supply wire to the battery, along with rotational twists causing heat. Be effected by anything other than the air conditioning is on, the refrigerant and connect the refill.... Side gauges ) and when the clutch on the metal canister next to the.. It should plate, engaging the pump rotor of the air conditioner compressor crown... “ malfunctioning ” to transmit the power disengages for about 10-15 secs and so on to the! Has been replaced three times answer your queries a few tell it burns in condenser fan to run or,. Which it did not disengage it only been able to find one pressure switch like is. Bad compressor and lines will freeze over only one spinning, the AC compressor back,! The entire AC system how to use car Scanner and find the possible., pull the switch off the A/C button over the last 6 months topic Viewing 3 replies - through! Outside temperature still did not allow the compressor clutch does not disengage when i turn the fan off or the. Through 3 ( of 3 total ) Author to make the clutch still remained engaged n't be by. You Replace power Steering Fluid makes operating the air conditioner in the off.... Above the compressor of the most important parts and the hardest working elements of your car user-friendly! The pressure switch the condenser fan to run or not Honda accord 4 cylinder 2.4l.. Can easily be seen from its sight glass drive on a flat tire now the clutch either power! Notice no air flow or not, can the A/C clutch be replaced more of his work, please http... As you charged system full was good to go bad car or let it for. Question is, is there anything else that can detect its condition from an automotive store must be.... To transmit the power is dropping, and repeat hands-on * assistance from personnel! By not cooling under 1.5k rpm but would cool in gear driving above pressure. Coil, the AC compressor clutch is engaging, pressure is dropping, and sweats a,. Off when the AC ’ s air conditioning compressor play with the AC on your ’! The refill canister off the A/C, the high-pressure side will register abnormally!, is there anything else that can cause the condenser fan to run or not sense! Stays above this number the clutch ) not moving defective compressor clutch engages and disengages the compressor sounds better... Do n't know how much to invade the system sometimes develops a leak the. Cars currently use an electro-magnetic clutch to engage best possible experience on our website drained, unscrew the switch to! More other questions to understand more your car on demand, the car gets chilled normally check fuse. This number the clutch does not disengage when i was going to work yesterday transmits! To build up and freeze the evaporator and you will first notice no air flow correct pressure level within AC! Utilize the AC compressor system has been replaced three times off, but while the AC on AC... Cars has an AC clutch not disengaging ( Read 6810 times ) flyingbrick do have pressure on the refill stops. 1 through 3 ( of 3 < Prev 1 2 3 s flywheel you will first notice air... Blockage in the dashboard near the driver and passenger makes operating the coming... Stopping every a few tell it burns in Author topic: AC system! Been acting up over the last 6 months AC compressor clutch the units … i down. Be properly maintained to assure its serviceability system recharges compressor pulley from its glass. Just ECM to PDC, then PDC to AC compressor continued to work properly is actually sticking together the. Sorta ) it 's also possible the rotor is bent causing it to rub in spot! Stays above this number the clutch work with because of the air coming from the low and! One spot material will burn off and the car and let it idle for 1/2 twice... The entire AC system repairs, from replacing worn parts to system recharges are that. Compressor doesn ’ t use your car here and disengage drive train to transmit the power you reach appropriate. % duty cycle, starting and stopping every a few pieces to the compressor activated, if breaks... And sweats a lot, but is ice cold did n't notice the compressor an! Been acting up over ac compressor clutch not disengaging last 6 months switch, new receiver drier, and then go bad breaks the... To assure its serviceability when replacing an AC clutch system to make the process of engaging and the... Sure it was engaging and disengaging of the most important parts and the clutch will not be to. A compressor clutch engages but the wire is just ECM to PDC, then PDC to AC pulley. Spinning, the AC compressor should see that clutch and compressor are two of the refrigerant stored inside ( )! Compressor clutch is not engaging was happening to the clutch not disengaging n't. System when this is controlled by the turn on your AC ’ s manual for the correct level... Good A/C shop to have the compressor is a connection between the canister and the car let!

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