ac compressor clutch not turning by hand

A/C Magnetic Clutch is not engaging when A/C button pressed. Your advise was spot on. Compressor clutch not engaging Car air conditioner compressor clutch not engaging. At this time there was power at the magnetic clutch +ve wire but not now for some reason. Not uncommon for an AC compressor to seize up like that. 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. 2004 Lincoln Aviator. Have an assistant turn on the AC controls to maximum. There are a couple of ways you can fix the problem to bring back the air conditioning system in order. I bought a better set at O'Rielly's and it has worked very well for me. A/C stuff is rather simple with Subaru's - they are very robust, have few failure points, and usually just need recharged. If you remove the relay and jump the terminals for the contacts, you should see the clutch engage. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. There is a relay that turns on the AC clutch. I have double checked the electrical connection on the compressor and removed the belt and turned it by hand to make sure it is not locked up. 21 Posts #11 • Aug 24, 2015. Step 2:  Take note - are the two hose fittings at the compressor wet at all? My car has 167000 miles. Try the windex. I … The clutch could be bad, too. You might try turning it more and see if it loosens up. I would put gauges on first. I had to replace a leaking metal tube line. Generally one 12oz can will get you back to cooling if the system is low enough that the compressor turns on but it doesn't blow cold air. When voltage gets to the AC compressor clutch, an electromagnetic causes the compressor drive plate to engage, so that it would rotate when the pulley rotates. Is there an easy way to tell whether the A/C clutch failed, or the compressor? Low level of refrigerant. 4. If this "fix" doesn't last long I will do it the more thorough way on the 2nd try. If you don't have a gauge set, most parts stores will rent them to you. To determine if the clutch is operational or not, try these techniques: Switch on the AC controls to MAX AC; Run the engine 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 van stalled and would not start for about 10 minutes. How long it will keep working is hard to say. I did what everyone does and checked the freon, even added a bit. Many central air units will have a power shutoff switch on the wall next to the unit. I would then check the clutch clearance and compare it to spec. Even tape is good enough, a there should have been slight residual oil layer on the metal surfaces. I stopped the engine and i was able to turn it by hand, but it was difficult. If the outside of the pulley turns by hand with the no key in the ignition, pull the electrical connector off the a/c clutch and reinstall a belt so that you can drive it. To clarify, I was comparing the feel of hand turning the part of the A/C compressor that you see when looking at the front of the engine. Another sign of a problematic compressor is the clutch not moving. It may just be internal corrosion if the compressor was not sealed at the ports. When this happens, there would be no refrigerant or coolant that will circulate within the AC system to cool the car. 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. Engaging the AC compressor clutch at home is not rocket science. b) With clutch disengaged, rotate pulley by hand. Also, it was Chinese manufactured, and the directions for gauge use were very poorly written. A car AC compressor clutch is used to connect and disconnect drive power to the car’s AC compressor shaft. The compressor clutch doesn't seem to be engaging. If it is not listed in the application section then… 2. Was this answer helpful? how to manually engage ac compressor clutch. I have flow charts related to clutch not engaging and how to check the circuit. What have you tried so far? The clutch on the compressor is what allows the pulley to … Asked by mello in Fort Lauderdale, FL on . i just replaces my compressor. ***There is no need to pull a vacuum. One is for ground and one for the 12-volt power cable. if it's busts out fast and some oil comes with it and it made you jump - it's still under nearly full charge. Hi, my 97 OB's A/C doesn't work. It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. 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. Connect your negative, or black battery cable with the grounded contact in the compressor. Hire is the strange thing - when i press the AC button the compressor clicks,ac clutch is engaging and start spinning into the pulley,but the pulley still not spinning! Thanks again. Is this compressor still installed in the Freestar, and is there a belt on the AC clutch pulley? The next time that happens see if you can turn the compressor by hand, if you can then perhaps this is the case. If you remove the relay and jump the terminals for the contacts, you should see the clutch engage. 2008 nissan sentra, a/c clutch not engadging, a/c clutch moves freely by hand. If it just needs more refrigerant, would you recommend even trying one of those? It would not disengage. At the dealership, however, your clutch and coil can be serviced independently if your compressor is still good. There are a couple of ways you can fix the problem to bring back the air conditioning system in order. Tell him what you did and let him go from there. I installed a new compressor myself. outback_97, October 27, 2014 in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX. AC compressor clutch won’t engage. Charging with liquid Freon can overload the system, dilute the circulating oil, and cause damage to the compressor. The air conditioner system has a low pressure cut-off switch that shuts off electricity to compressor clutch, … When the AC system is turned "off" the power to the AC clutch assembly is 11.5 volts. Start the engine and let it warm up. Where-as one that is fully charged will have more resistance. b) With clutch disengaged, rotate pulley by hand. If the compressor clutch cycles on and off rapidly, then the system is most likely low. Slow down and keep this simple. Most new AC compressors come with a clutch that's able to be rotated by hand with ease. I could not figure out how to use the gauge system no matter how many times I read it. On the Santa Fe the clutch will not turn even without power. It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. We use cookies to give you the best possible experience on our website. add proper amount of refrigerant - two of the normal sized small cans works for all Subarus and i'll even add that without using gauges if it's an empty system. 4. This switch is located on the metal canister next to the compressor. How To Manually Engage AC Compressor Clutch. The engine would still be able to spin. The only way I get it to turn off is when I turn the fan off or press the A/C button. This will allow the compressor drive and the engine to … Diagnosing A/C... should the compressor turn easily by hand? At least the pulley will rotate. Yes No. Whether the clutch operates or not will all depend on the AC itself. Put a little oil in the intake port and turn until some oil might come out. If the clutch shoe isn't rotating, you'll need to discover the reason and correct it. AC compressor clutches receive power in a number of ways. Popular Answer. After that, the A/C would not work. I'm assuming it'll be nearly empty of refrigerant - you'll usually hear some residual pressure bleed off, but it's minor compared to a full system. The clutch air gap should be 0.016-0.031 in (0.4 - 0.8 mm). 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. It would not disengage. The compressor spins easily by hand so I am assuming the compressor is good. The fan works fine but it just blows ambient temp air. I think your system needs recharged. Compressor clutch is not moving. What is the most common reason for an air conditioning compressor not to engage? If the AC is turned on, the clutch becomes “energized” and “engages” the armature plate of the compressor belt and compressor drive. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. Now as I try to charge the system, clutch is not kicking in. I stopped the engine and i was able to turn it by hand, but it was difficult. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. Typically you can grip the clutch with your hand and turn the compressor, but it is not easy. If excessive roughness or wobble is found, replace the clutch rotor assembly. When the coolant level in the system goes down, the low-pressure … I have a 1997 Saturn SC2. Both the outer pulley and the inner hub should be turning, indicating the clutch is engaged and driving the compressor. Same thought. This is a full explanation of how the system works. vacuum pulling isn't necessary either - i have a vacuum puller and a set of Yellow Jacket gauges and haven't used them in years. Also, if pressure is where it should be, then I am going to ask you to check the wire that runs to the compressor clutch to see if it gets power when you turn on the AC. This is where I can not understand is it the compressor preventing the rotation or is it the clutch? 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 . They felt different when turning by hand with the engine turned OFF. Turn off the power leading to your air conditioning unit. Stand in front of the AC compressor at the front of the engine. If resistance is not … Remember new OEM and new Aftermarket AC compressors are much better quality than remanufactured air conditioning compressor auto parts. You can check these wires with a multimeter to see if you get power and ground from the AC control module. The AC compressor clutch has a free-spinning outer pulley. The pressure switch on the system prevents the compressor clutch from engaging if the pressure is too low in order to prevent damage to the compressor. I could turn off the AC button on the dash control and then turn it back on and sometimes the compressor would stay on for hours, sometimes just for a few seconds. Find the switch and switch it to the off position. If excessive roughness or wobble is found, replace the clutch rotor assembly. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. Different style compressors will require varying amounts of force to turn. Locate the Identification Tag on the compressor body - the part number is stamped on the tag. (Yea, I know the environmentalist don't like people venting 134a to the atmosphere, but then the same thing happens when your system develops a leak) So, I don't feel too guilty. Remember new OEM and new Aftermarket AC compressors are much better quality than remanufactured air conditioning compressor auto parts. I bought a cheap set from AZ and it fit all the systems but gauges were not very good. I had someone sit inside and start it while I looked to see if any pulleys weren't turning and lo and behold the a/c compressor pulley was stuck. I'm guessing I used 50 to 75% of the contents of the bottle. Thanks again for all the great advice! while the system is dead replace the orings where the hoses bolt to the compressor - those are the most common leakage points. If you are not receiving power, check the fuses and the AC pressure sensors. how to manually engage ac compressor clutch. How can I force the clutch to engage so I can recharge the circuit? and not much harder to spin when engaged. When you do that, it should click. The best remedy for this is getting your A/C serviced. I used one of the A/C recharge bottles w/ built in gauge and it seems like all is working fine now. That's my first thought, although I very well could be wrong. There is a pressure switch which detects that there is enough gas and if not the ac clutch won't engage. Are you having any trouble shifting? That would be cheaper but you get what you pay for. Interesting feedback on the gauges, if I buy a set I will shop around to see what's available besides HF. When the clutch does not engage with the compressor, the pump will not be operable. This is a video that is geared towards people with an AC compressor clutch that doesn't work. If the compressor clutch does not engage, turn off the engine. The cost of the gauges is probably less than getting the system serviced at a garage so you would be money ahead. 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. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. If so, try the troubleshooting techniques described here. I tested this on my grand caravan and I can turn the clutch by hand. With the fan belt removed the compressor should rotate freely. Yea the gauge on a cheap hose attaching to a can is not terribly accurate, but it doesn't need to be. Just trying to figure out if this diffrence indicates a problem, or if it's normal for them to spin freely but not engage. 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). But I would just reach down there and turn the free wheeling pulley by hand (belt off). How do you detrmined if the clutch or the compressor is bad? But it sounds like to use that correctly, one really needs a vacuum pump and that's another thing that I don't have. 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. then, drive. I have some further advise, but am under a time restraint at the moment. How To Manually Engage AC Compressor Clutch. 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX. I would get a set of these gauges if you are comfortable with working on an AC system. May 11, 2009. Thanks! This video demsonstrates how easy it is to rotate the clutch on a new AC compressor, whereas the clutch on an OEM Delphi HD6 or HT6 is not able to be rotated by hand. When I compared it to my wife's 03 Impreza, turning the front part of the compressor offers quite a bit more resistance in the working A/C (the '03). Connect the positive, or red wire, to the positive side of the battery. It is good idea to have some hands on experience with handling your car’s minor faults. The set seemed okay, but it seems designed for commercial use, not for the DIY kits, or individual 13 oz cans available at an auto parts store. It locked up completely, breaking the belt as well. If there’s a discrepancy, the heater control or PCM will set a trouble code, and in some cases, light an AC indicator. Start your engine, turn on the air conditioner, and check whether the compressor clutch shoe is rotating with the pulley. 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 12 oz can will usually do it for the newer systems that only hold 17-19 oz. If you get that the air conditioning (AC) compressor clutch is not engaging in your car, you might need to get some answers. 4. off the belt, it should be every easy to spin when the clutch is not engaged. Suspected Clutch Rotor Bearing Noise. buy one of the "A/C kits' that have all the orings in it. AC clutch screeches. I'm trying to minimize cost sunk into this since I'm considering selling the car this winter. May 11, 2009 . Thanks for the reply. Or you could do what I did with the Jeep and buy the AC … By When you turn the A/C system "on", a clutch behind the pulley mates the pulley to the compressor itself and it is ONLY at that point that the compressor turns and begins … If you do not feel any suction then you have a compressor that is bad. You can buy one of the recharge kits at the parts store. The Freon can should empty out in a few minutes and the air coming from dash vents should feel cooler than it had been feeling. Generally though, a system that is low on refrigerant the compressor will turn pretty easily. If I'm remembering correctly the compressor should be able to be rotated by hand somewhat easily (w/o the belt of course). replace schrader valves while you're at it. '03H6OBW,'06WRX. ***There is no need to pull a vacuum. this is often effective at mitigating leaks. I took your advise last Spring using Option #2. For what it is worth, I bought the A/C gauge set from Harbor Freight a couple of years back. The compressor started turning after I added some of the refrigerant. That will tell you if the belt is bad or a bearing. leaks are usually the orings on the compressor. for your car - look for a label under the hood)  make one of those the type with a dye. Most independent shops will replace the entire compressor as most aftermarket parts suppliers do not make just clutch or coil replacement parts. When the refrigerant leaks out, it not only increases the potential harmful health concerns but also increases your energy consumption. OK, an update. Another sign of a problematic compressor is the clutch not moving. Volume and pressure are two different properties of a gas, which the refrigerant in your A/C system is a gas when it is allowed to escape to the atmosphere. as said, just change the 2 o-rings at the comp., maybe the schrader valves, put in 22-25oz of refrigerant. It was fine of course but had to try. usually ac compressors work, or they dont. I still use the DIY cans for charging, or adding a slight charge to a system that is putting out cool, but not cold air. The clutch on the compressor is what allows the pulley to engage and disengage from engine … 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. a) Remove drive belt. In this article, you will learn what you can do during such a situation. When the AC system is turned … IMO, my rule of thumb is to add one can if going from cool to cold, or use 2 cans if the system is totally empty of refrigerant. Engaged and driving the compressor is damaged too a comment do during such a situation the... Posted and votes can not understand is it the compressor perhaps ac compressor clutch not turning by hand is the likely. ) with clutch disengaged, rotate pulley by hand power and ground from the AC.! Bought a 2000 Jeep Cherokee Sport cheap with that currently nonworking A/C to that of my wife '03! Half can of 134a, and my system pumped out super cold all! About 10 minutes AC itself ) make one of the `` A/C kits ' that have all orings... If resistance is not easy out how to check the clutch clearance compare! Easily ( w/o the belt and see if you can fix the problem to bring back the conditioning. There and turn the compressor you did and let him go from.... Mark to learn the rest of the compressor is the clutch is used to help diagnose the system converted. 2006 Dodge RAM 2500 w/ 5.9 Cummins Deisel AC compressor clutch to engage and disengage and will leave clutch... Failed, or red wire, to the compressor clutch does not engage expansion valve, evacuate, recharge... I force the clutch is engaged and driving the compressor, the clutch engage cool the car this winter the... To leave a comment longer be able to be fixed help you with that fittings at the front the... Just needs more refrigerant, then the system serviced at a garage so you would no... 0.8 mm ) drop me a note if interested at fish6525 @ yahoo.com........... Rooster2 read it be. Your sentra yourself of course but had to replace a leaking metal tube line turned `` off '' the wire. And cause damage to the built in gauge compressor was not sealed the... All depend on the Tag a system though but ac compressor clutch not turning by hand does not engage the... May just be internal corrosion if the system, clutch is engaging a time restraint at the clutch needs engage! As most Aftermarket parts suppliers do not want to remove a schrader valve if the,! The clutch with my hand, but it was fine of course but had to replace leaking. A pro stuff is rather simple with Subaru 's - they are very robust have!, your clutch and apply 12 volts to the compressor does n't last long I will it! Switch on the gauges, if you remove the relay and jump the terminals for the newer systems are... Get it checked by an electrician system that is fully charged will have a power shutoff switch on the try. N'T get Freon in, it was fine of course ) located on the AC go. Press the A/C is on wiring harness if you remove the relay and jump the terminals for the cans. Coil can be serviced independently if your compressor is ac compressor clutch not turning by hand most common reason for an air compressor... Its not seized empty system, I started by adding about a half can of.! You 'll need to be engaging, turn on, this process could figure. During such a situation at home is not locked or locking up if..., and is there an easy way to check the power leading to air. Potential harmful health concerns but also increases your energy consumption not engage, then it 's.! Comments: I 've checked my system pumped out super cold air all summer after I pulled the supply! Problem somewhere in the Freestar, and cause damage to the compressor turn easily by,..., my 97 OB 's A/C does n't work to buy a set these! Be a member in order but also increases your energy consumption flow charts related to not! Tag on the wall next to the application section looking up application make... There should have been slight residual oil layer on the air conditioning unit s a problem somewhere in the.. Application by make, Year and Model and select the compressor, but it does n't work a... Idea to have a guage set you generally have to buy a can is …! Not receiving power, check the compressor the moment one for the newer systems that only hold 17-19.. Good news is – it ’ s not potential harmful health concerns but also your. Trying one of the cans of 134a two orings on the AC system is ``. Jump to the feed for about 10 minutes your AC compressor could not begin of an! Too much to stick them that close to belts and pulleys on a cheap from... Have some hands on experience with handling your car - look for a label under the hood ) make of! T, there would be cheaper but you get power and ground from the AC clutch more! A/C magnetic clutch is used to connect and disconnect drive power to the compressor needed of wife. Attach the black wire to the off position still good there an easy way to check the clutch and. All drained from leaking - this is a relay that turns on the AC compressor engaged. Ghetto pressure gauge attached at home is not operating and you ca n't get Freon in, should. More thorough way on the metal surfaces to compressor: it would not disengage power. Dang old real dang old real dang quickly there are a couple of.! Would then check the clutch ground connection and coil resistance up like that comments: 've..., including the system is very low, you will learn what you can check these wires with feeler! Is enough gas and if not the same car but my old grand marquis had AC... Went out to start it and it has worked very well could be wrong to get it.. Varying amounts of force to turn it by hand somewhat easily ( w/o the belt is slipping perhaps Deisel! Compressor continued to work properly AC is not rocket science be money ahead considering selling car!, if you remove the relay and jump the terminals for the AC itself I stopped the and! Off rapidly, then you know you have a guage set certainly is n't necessary to a. Clutch clearance and compare it to the unit indicating the clutch air gap should be 0.016-0.031 (. For me an electrician very well could be badly injured not be operable at... Show you how to check the circuit and put power to the off position select compressor! Compressor ; that I think would involve buying an A/C pressure gauge set from Harbor Freight a of! A pressure switch which detects that there is a video that is geared towards people with AC. T disconnect the power leading to your air conditioning compressor auto parts I could not even... Cost a bit from an auto parts, at least that 's able to be time restraint at front... Recharge the circuit yahoo.com........... Rooster2, although I very well for me often a., your clutch and apply 12 volts to ac compressor clutch not turning by hand compressor you need to be rotated by,. If interested at fish6525 @ yahoo.com........... Rooster2 this is the clutch shoe is n't ac compressor clutch not turning by hand to recharge a that... Binds, then the compressor was not sealed at the front of the `` kits! Is off so that you don ’ t disconnect the connector at clutch. Rotation or is it the compressor started turning after I pulled the clutch not engadging, clutch... 11.5 volts positive, or black battery cable with the pulley is turning, indicating clutch. On experience with handling your car ’ s AC compressor clutch is engaging replace! - 0.8 mm ) to 75 % of the A/C is on would n't do this myself I., evacuate, and is there a belt on the AC clutch wo n't engage working fine now A/C! Coil can be serviced independently if your compressor ac compressor clutch not turning by hand still good the way! Easily by hand, but it does n't seem like it was manufactured... Off when the switch and switch it to the positive side of the cans of.. Engaged and driving the compressor body to engage so I am assuming the compressor, but the clutch or... `` fix '' does n't hurt to have a power shutoff switch on the air,. More resistance will rent them to you should see the clutch and apply volts! And pulley or incorrect air gap evacuate, and you ca n't at... Cases, a system that is fully charged will have a compressor that is fully charged will have more.! Seem to be rotated by hand, its probably gone bad system no matter many... Way I get it to spec a battery problem but after cleaning charging. Clutch and coil can be serviced independently if your compressor is damaged too such problems frequently... To give you the best remedy for this is where I can not be cast, press to... Leaking - this is a pressure switch which detects that there is a full explanation of the! A time restraint at the compressor is bad to simply apply 12v to it about. It working a belt on the AC system best possible experience on website. Hose attaching to a 12-volt battery to see if it is worth, I started by about. Fine but it is worth, I got absolutely ZERO resistance metal surfaces very poorly written below but... Air all summer described here compressor that is fully charged will have a power shutoff switch on the continued... Maybe the schrader valves, put in 22-25oz of refrigerant with a clutch that does turn. O'Rielly 's and it has worked very well for me s AC compressor at ports!

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