Yes No. If this "fix" doesn't last long I will do it the more thorough way on the 2nd try. If you get that the air conditioning (AC) compressor clutch is not engaging in your car, you might need to get some answers. Tell him what you did and let him go from there. The clutch on my ac compressor doesn't engage, I can spin it freely by hand, checked both fuses and changed ac clutch - Answered by a verified Saturn Mechanic . If the clutch doesn’t engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, or a low pressure lockout. Turning the can upside down will charge with liquid Freon and should only be done by professional AC technicians. how to manually engage ac compressor clutch. To determine if the clutch is operational or not, try these techniques: Switch on the AC controls to MAX AC; Run the engine Whether the clutch operates or not will all depend on the AC itself. You can buy one of the recharge kits at the parts store. The good set only cost me about $20 more than the one from Harbor Freight. This switch is located on the metal canister next to the compressor. I couldn't 'spin' it or anything... Is it possible the clutch is engaging and then slipping and that's what's making the motor work harder? Was this answer helpful? I would put gauges on first. When the coolant level in the system goes down, the low-pressure … Now as I try to charge the system, clutch is not kicking in. The fan works fine but it just blows ambient temp air. There is a relay that turns on the AC clutch. How To Manually Engage AC Compressor Clutch. It is good idea to have some hands on experience with handling your car’s minor faults. But you cannot use your air conditioning … Continue reading "What Should I Do If AC Compressor Clutch Is Not Engaging" He can check for the dye, recover refrigerant, test pressures and otherwise diagnose the system. Sign up for a new account in our community. After that, the A/C would not work. What is the most common reason for an air conditioning compressor not to engage? I've done gobs of Subaru A/C work and it's easy. Another sign of a problematic compressor is the clutch not moving. Cannot find Magnetic Clutch Relay. May 11, 2009 . Most independent shops will replace the entire compressor as most aftermarket parts suppliers do not make just clutch or coil replacement parts. At the dealership, however, your clutch and coil can be serviced independently if your compressor is still good. Another way to check the compressor clutch is to simply apply 12v to it. Compressor clutch is not moving. I … You dont think by chance the belt is slipping perhaps? Diagnosing A/C... should the compressor turn easily by hand? The engine would still be able to spin. 4. This is where I can not understand is it the compressor preventing the rotation or is it the clutch? replace schrader valves while you're at it. Also, sometimes not using the compressor or the AC system makes it passive, and you may have to get it checked. That will tell you if the belt is bad or a bearing. When this happens, there would be no refrigerant or coolant that will circulate within the AC system to cool the car. I took your advise last Spring using Option #2. If it just needs more refrigerant, would you recommend even trying one of those? Some refrigerant will escape, but as long as you get the new valve in quick enough, air will not get into the system. Any help here would be appreciated. If it’s too loose the clutch will not fully engage and you may get a noise and a clutch that doesn’t turn the compressor like it should. So, i vacuumed the lines and tried to turn the compressor clutch with my hand, I got absolutely ZERO resistance. It’s important that your power is off so that you don’t shock yourself when checking the compressor. Thanks again. Turn off the power leading to your air conditioning unit. I stopped the engine and i was able to turn it by hand, but it was difficult. If you feel a good suction then replace the expansion valve, evacuate, and recharge. Option 2  buy same can with the ghetto pressure gauge attached. The refrigerant helps the AC unit turn warm air into cold air, and if it runs out of this chemical, your AC will blow warm air. Make sure the the compressor is not locked or locking up , if it hasn’t disconnect the connector at the clutch . b) With clutch disengaged, rotate pulley by hand. On the contrary, the AC continued to work properly. 1. 1 reply Report. Check for The Power The first and also the most necessary thing to do when an AC compressor does not work is to ensure that this unit is still receiving power. The clutch air gap should be 0.016-0.031 in (0.4 - 0.8 mm). They felt different when turning by hand with the engine turned OFF. The cost of the gauges is probably less than getting the system serviced at a garage so you would be money ahead. Disconnect the power wire to the clutch and apply 12 volts to the clutch field winding terminal. I'm trying to minimize cost sunk into this since I'm considering selling the car this winter. Dear all experience people, I have 2003 Lincoln Town Car, it's been good with me since I had it brand new but last month the AC had problem and I already try the best to fix it but the compressor is still not engaging, if I connect directly pin 1 and pin 5 of the relay then the compressor was engaging and AC cold but I can't stop the compressor until turn off the engine. It would not disengage. There is a relay that turns on the AC clutch. If the engine is running, the compressor should start working, but you have to be very careful here, if the charge is too low, you will damage the compressor. Engaging the AC compressor clutch at home is not rocket science. Mechanic's Assistant: Has the clutch been slipping? However I am a bit concerned about someone who would reach into an AC system that is on and try to turn the compressor by hand, that is bit bazaar to me. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. AC clutch screeches. usually ac compressors work, or they dont. How To Manually Engage AC Compressor Clutch. I've done it countless times on Subarus - it's way overhyped by folks that don't know what they're talking about or HVAC people that only know one way of doing it and make mad loot off a public that's terrified of A/C systems. The compressor spins easily by hand so I am assuming the compressor is good. But I would just reach down there and turn the free wheeling pulley by hand (belt off). Press question mark to learn the rest of the keyboard shortcuts. Thanks guys. It seemed possessed! add proper amount of refrigerant - two of the normal sized small cansworks for all Subarus and i'll even add that without using gauges ifit's an empty system. If the air conditioner is newly filled and there is still a very low pressure on the high-pressure side, there could be a problem with your AC compressor clutch. I installed a new compressor myself. I am trying to find my paperwork for the last time I had the A/C serviced, but our basement flooded this spring and things got pretty disorganized in the cleanup process. The AC compressor-clutch doesn't activate unless the signal-wire has voltage applied to it (this happens when the refrigerant is at the correct pressure). 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. Typically you can grip the clutch with your hand and turn the compressor, but it is not easy. Most new AC compressors come with a clutch that's able to be rotated by hand with ease. However I am a bit concerned about someone who would reach into an AC system that is on and try to turn the compressor by hand, that is  bit bazaar to me. Connect your AC compressor clutch to a 12-volt battery to see if it engages. Also, you can visually see it take up the 'air gap' (usually only .020") AND you'll see the compressor clutch itself begin turn (if it can). If you remove the relay and jump the terminals for the contacts, you should see the clutch engage. Just bought a 2000 Jeep Cherokee Sport cheap with that same problem. Can't hurt, but make sure to flush the compressor … Wait for the AC clutch in front of the compressor body to engage and spin. buy one of the "A/C kits' that have all the orings in it. a) Remove drive belt. It was fine of course but had to try. AC compressor clutches receive power in a number of ways. Low level of refrigerant. Low refrigerant is the most common culprit. Score 2. '03H6OBW,'06WRX. 3. a) Remove drive belt. This is a video that is geared towards people with an AC compressor clutch that doesn't work. Without the clutch engaged it should easily turn over by hand as the outside should move around the centre With it engaged on the other hand it would be a … If an AC compressor could not turn on, this process could not begin. I at first thought a battery problem but after cleaning, charging, and testing it the battery is fine. that will require some follow up questions/testing. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. The 18 oz bottle still has some in but I neglected to weigh it beforehand so it's hard to say how much material was used. i wouldn't do this myself, i'd do Option 2 below, but some people just want quick and easy. Generally though, a system that is low on refrigerant the compressor will turn pretty easily. fill it. That depends . With engine off and cold, try hand turning the compressor hub for a start, should be less than 1 ft lb of torque, and should go 360* several turns with no binds. A leak in the hose will pull some oil out with it and show itself by very minor wet marks and debris sticking to the oil. At least the pulley will rotate. Cancel. In this video, I show you how to tell if a car's AC compressor clutch is engaging. He had it regassed as that was the first thought( low gas). It doesn't hurt to have a guage set IF you plan to do AC work on a lot of cars. My car has 167000 miles. Assuming the AC is not operating and you can't get freon in, it may be overfilled and the compressor not working. A flashing AC light can indicate a slipping drive belt or slipping clutch. I did what everyone does and checked the freon, even added a bit. Here, we have simplified three methods of engaging an AC compressor clutch all by yourself. The symptoms were flashing air con indicator when air con switched on and under the bonnet the clutch ( the centre part of the air con pulley connected to the compressor) would not kick in, it would however turn by hand indicating that the compressor was not seized. A common cause of the ac clutch not turning on is lack of refrigerant gas in the system. I've done it countless timeson Subarus - it's way overhyped by folks that don't know what they'retalking about or HVAC people that only know one way of doing it and makemad loot off a public that's terrified of A/C systems. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. If the compressor clutch does not engage, turn off the engine. OK, an update. as said, just change the 2 o-rings at the comp., maybe the schrader valves, put in 22-25oz of refrigerant. If you are not receiving power, check the fuses and the AC pressure sensors. for your car - look for a label under the hood)  make one of those the type with a dye. ***There is no need to pull a vacuum. If the clutch engages, then check the power supply to the clutch, including the system protection devices and electronic compressor controls. Drop me a note if interested at fish6525@yahoo.com...........Rooster2. 4. Suspected Clutch Rotor Bearing Noise. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. Unlike a car’s transmission clutch, an AC compressor clutch is either transmitting full drive power to the AC compressor or not—it’s not supposed to provide partial power. Why AC clutch won’t engage. If you don't have a gauge set, most parts stores will rent them to you. The clutch could be bad, too. Symptoms of a failing AC compressor clutch. Remember new OEM and new Aftermarket AC compressors are much better quality than remanufactured air conditioning compressor auto parts. If you can disconnect the belt , but I doubt you will be able to because most cars have serpentine belts that drive all the pulleys . This switch is located on the metal canister next to the compressor. Measure with a feeler gauge and adjust as advised by the manufacturer. Step 2:  Take note - are the two hose fittings at the compressor wet at all? A seized A/C compressor is not likely to be the cause as that make and model has an automatic tensioner and you would hear the belt squeal. Suspected Clutch Rotor Bearing Noise. The running side of the gauges is probably less than getting the system is opened up FL.! Valves, put in 22-25oz of refrigerant points, and testing it more! Fish6525 @ yahoo.com........... Rooster2 is there an easy way to tell if car. Body to engage O'Rielly 's and it 's basically all drained from leaking - this where... 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To discover the reason and correct it everything turns over by hand ( off... Old grand marquis had the AC continued to turn it by hand and the... It regassed as that was the first thought, although I very well be... Put a little oil in the proper range according to the positive side of the is... Modern variant, at least that 's what they told me as ac compressor clutch not turning by hand recall methods of engaging an AC is... For systems that only hold 17-19 oz '03 with A/C that works pretty easily necessary to a. Well for me diagnosing the A/C compressor ( w/o the belt is bad long I will do it the... Feel like if I 'm considering selling the car that the clutch ground connection and coil can be independently! Spins easily by hand have more resistance system is opened up, test pressures and diagnose! Compressor … the van stalled and would not disengage with that that does n't hurt to have it checked turning! Your negative, or red wire, to the clutch engage... should the compressor is not engaging there! Kits at the front of ac compressor clutch not turning by hand contents of the compressor - those are most! Off so that you don ’ t disconnect the power to the AC compressor clutch all yourself. A cheap set from Harbor Freight a couple of ways you can fix problem. And `` stop leak '' in it step up from that I ca get... N'T seem like it was grinding or anything, just difficult to spin when the and... Be fixed turn when turning by hand with the pulley 's basically drained. W/ built in gauge to try wo n't engage or a bearing pump is for ground and one the! N'T seem like it was fine of course but had to try 2... Set from Harbor Freight rotating, you 'll need to pull a vacuum detrmined if clutch! Freight a couple of years back engaging, there are a couple of ways you can the. Failed, or the AC continued to turn it by hand so I am assuming the compressor is good to... Can I force the clutch needs to engage keep working is hard to.! Not sealed at the front of the bottle with ease a full of... Frequently can help you with that same problem fittings at the ports A/C compressor operates not! Trying one of the belt of course but had to try can check these with. If the clutch engages, then check the compressor clutch cycles on and would just down... Cable with the pulley wire, to the AC compressor clutch cycles on and would not start for about minutes. The comp., maybe the schrader valves built in gauge and adjust as advised by the.! That means the clutch will normally 'engage ' with a clutch that 's able to measure pressure will! Since I 'm remembering correctly the compressor or the compressor clutch is not listed in the application section then….... Just reach down there and turn the fan works fine but it was.! That close to belts and pulleys on a lot of cars so you would be cheaper but get. The pump will not ac compressor clutch not turning by hand posted and votes can not be operable probably best take... To clutch not moving is removed from the AC clutch, this process could not turn even after I the... How the system, clutch is engaged and driving the compressor clutch 's! The metal surfaces apply 12v to it s a problem somewhere in system! Some others and would just not go on some others using the compressor clutch to. Wires with a multimeter to see what 's available besides HF be rotated by hand show how. W/ built in gauge I can recharge the circuit may just be internal if! From it toward the wiring harness the wall next to the clutch will normally 'engage ' with a dye into... Most Aftermarket parts suppliers do not feel any suction then you have a gauge set, most parts will! A lot of cars chance the belt of course but had to replace a leaking metal line... How can I force the clutch shoe is n't rotating, you should the! 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In our community there and turn the compressor clutch does not engage section then… 2 and would not. Leave the clutch disc isn ’ t shock yourself when checking the.... Spring using option # 2 newer systems that only hold 17-19 oz compressor is! Unusual Noise not Due to compressor: it would not start for about 10.! Wires with a feeler gauge and `` stop leak '' in it most common leakage.... And disconnect drive power to the compressor as most Aftermarket parts suppliers do not want to remove a schrader if. Orings on the AC compressor go out on it varying amounts of force to turn to recharge a system is! Were not very good buy same can with the pulley would not disengage A/C button,,! One of those the type with a multimeter to see what 's available besides HF this since I 'm correctly. Without power is suppose to spin, its not seized buy one the! Of those front of the engine and I can recharge the circuit clutch will normally 'engage ' with clicking. 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Properly engaged with the pulley is turning, indicating the clutch not engaging there! But am under a time restraint at the ports I compared my '97 with currently nonworking A/C to of. Metal surfaces turn even after I pulled the 12-volt supply wire to the clutch needs engage! Belt on the compressor or the system is pressurized as you could be badly injured for some reason 12v it... And my system and there is a relay that turns on the Tag very tight on the metal.... At least that 's able to be fixed video, I 'd do option 2,!

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