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ac compressor clutch not turning by hand

Thanks guys. Try the windex. 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 … The compressor spins easily by hand so I am assuming the compressor is good. The clutch on the compressor is what allows the pulley to … The cost of the gauges is probably less than getting the system serviced at a garage so you would be money ahead. Step 1:  Go hit the schrader valve for a fraction of the second - just to see if there's any pressure at all. Same thought. I installed a new compressor myself. I bought a cheap set from AZ and it fit all the systems but gauges were not very good. 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. Suspected Clutch Rotor Bearing Noise. If the compressor clutch is not engaging, there are many possibilities. He can check for the dye, recover refrigerant, test pressures and otherwise diagnose the system. 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 . Generally though, a system that is low on refrigerant the compressor will turn pretty easily. The AC compressor clutch has a free-spinning outer pulley. That's my first thought, although I very well could be wrong. 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. If so, try the troubleshooting techniques described here. The good set only cost me about $20 more than the one from Harbor Freight. What is the most common reason for an air conditioning compressor not to engage? 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. Most new AC compressors come with a clutch that's able to be rotated by hand with ease. I would then check the clutch clearance and compare it to spec. It would not disengage. AC compressor clutch will not turn on. It's easy! It’s important that your power is off so that you don’t shock yourself when checking the compressor. 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. 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. as said, just change the 2 o-rings at the comp., maybe the schrader valves, put in 22-25oz of refrigerant. The AC button lights up and you can definitely feel the engine working harder when the clutch is engaged, but the front of the AC compressor isn't turning. If you get that the air conditioning (AC) compressor clutch is not engaging in your car, you might need to get some answers. Not sure what's going on. AC compressor clutches receive power in a number of ways. Answer. Then I continued adding more until I was in the proper range according to the built in gauge. The Magnetic Coil has been replaced and works when hard wired to 12v, the system has refrigerant (checked by garage) and functions when hard wired. In this article, you will learn what you can do during such a situation. If the compressor clutch does not engage, turn off the engine. The engine would still be able to spin. On the contrary, the AC continued to work properly. This will allow the compressor drive and the engine to … Asked by mello in Fort Lauderdale, FL on . On the contrary, the AC continued to work properly. I might have problems with the radiator fans that turn on with the AC, they do now go to high speed when the AC is on. This is a full explanation of how the system works. Can't hurt, but make sure to flush the compressor … ***There is no need to pull a vacuum. 2008 nissan sentra, a/c clutch not engadging, a/c clutch moves freely by hand. A/C Magnetic Clutch is not engaging when A/C button pressed. It locked up completely, breaking the belt as well. '03H6OBW,'06WRX. Sign up for a new account in our community. The air conditioner system has a low pressure cut-off switch that shuts off electricity to compressor clutch, … Or you could do what I did with the Jeep and buy the AC … If you remove the relay and jump the terminals for the contacts, you should see the clutch engage. If the clutch shoe isn't rotating, you'll need to discover the reason and correct it. Put a little oil in the intake port and turn until some oil might come out. With all the automotive jargons we’ve discussed earlier, you might think that learning how to manually engage the AC compressor clutch is true rocket science. Have an assistant turn on the AC controls to maximum. If you’re here, chances are you’ve tried to recharge your AC system and found a compressor clutch not engaging issue. Method 1: Add More Coolant. 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. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. 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. Compressor clutch is not moving. leaks are usually the orings on the compressor. Mechanic's Assistant: Has the clutch been slipping? I feel like if i can turn it by hand, its not seized. replace those if you need to attempt a fix. BTW, if the pressure is low, but still positive, that is there is some pressure, then air has not gotten into the system and you don't need a vacuum pump. If it is not listed in the application section then… 2. I could not figure out how to use the gauge system no matter how many times I read it. If an AC compressor could not turn on, this process could not begin. http://www.harborfreight.com/a-c-manifold-gauge-set-92649.html. You can check these wires with a multimeter to see if you get power and ground from the AC control module. I have flow charts related to clutch not engaging and how to check the circuit. Measure with a feeler gauge and adjust as advised by the manufacturer. I read a lot about Subarus. Now as I try to charge the system, clutch is not kicking in. I … Locate the Identification Tag on the compressor body - the part number is stamped on the tag. The clutch could be bad, too. The clutch on the compressor is what allows the pulley to … 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. This switch is located on the metal canister next to the compressor. Different style compressors will require varying amounts of force to turn. Suspected Clutch Rotor Bearing Noise. Rust accumulation on clutch plate and pulley or incorrect air gap. How do you detrmined if the clutch or the compressor is bad? That means the clutch has properly engaged with the pulley. Comments: I 've checked my system and there is no gas in it. He had it regassed as that was the first thought( low gas). Also, it was Chinese manufactured, and the directions for gauge use were very poorly written. If there’s a discrepancy, the heater control or PCM will set a trouble code, and in some cases, light an AC indicator. The compressor will not cycle off when the A/C is on. I'm trying to minimize cost sunk into this since I'm considering selling the car this winter. I had a set of gauges from Harbor Freight but the connectors were so poorly manufactured that they did not fit on all the R134 systems that I had. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. 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. 3. for your car - look for a label under the hood)  make one of those the type with a dye. Refer to the application section looking up application by Make, Year and Model and select the compressor needed. How long it will keep working is hard to say. how to manually engage ac compressor clutch. Unusual Noise Not Due to Compressor: If you feel a good suction then replace the expansion valve, evacuate, and recharge. Connect your AC compressor clutch to a 12-volt battery to see if it engages. 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. So, i vacuumed the lines and tried to turn the compressor clutch with my hand, I got absolutely ZERO resistance. 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. ***There is no need to pull a vacuum. It should turn freely with the belt off and have virtually no resistance while you spin it.Even with the clutch engaged, you can normaly turn the compressor by hand, it may be hard to turn but it should not be so hard that you cannot turn it even slightly. 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. Another sign of a problematic compressor is the clutch not moving. Charging with liquid Freon can overload the system, dilute the circulating oil, and cause damage to the compressor. Start your engine, turn on the air conditioner, and check whether the compressor clutch shoe is rotating with the pulley. I stopped the engine and i was able to turn it by hand, but it was difficult. It seemed possessed! When you do that, it should click. May 11, 2009. i wouldn't do this myself, i'd do Option 2 below, but some people just want quick and easy. The only way I get it to turn off is when I turn the fan off or press the A/C button. I would put gauges on first. It's in the 90's in GA and that got real dang old real dang quickly. 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. 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. I compared my '97 with currently nonworking A/C to that of my wife's '03 with A/C that works. Not the same car but my old grand marquis had the AC compressor go out on it. Wait for the AC clutch in front of the compressor body to engage and spin. Bad clutch coil or improper air gap. But for now it all seems to be working great. I have some further advise, but am under a time restraint at the moment. When the clutch does not engage with the compressor, the pump will not be operable. I did what everyone does and checked the freon, even added a bit. If such problems happen frequently, you need to have it checked by an electrician. Whether the clutch operates or not will all depend on the AC itself. 1 reply Report. and not much harder to spin when engaged. If excessive roughness or wobble is found, replace the clutch rotor assembly. 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. Connect your negative, or black battery cable with the grounded contact in the compressor. usually ac compressors work, or they dont. 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. I tested this on my grand caravan and I can turn the clutch by hand. A car AC compressor clutch is used to connect and disconnect drive power to the car’s AC compressor shaft. In some cases, a fuse would be blown or a breaker would be tripped. Now, turn on the air conditioning and look again. Didn't seem like it was grinding or anything, just difficult to turn. 4. Reading the Maintenance Tips frequently can help you with that. Shouldn’t I get a little resistance? Engaging the AC compressor clutch at home is not rocket science. I know that the system was converted to a more modern variant, at least that's what they told me as I recall. The AC compressor clutch often has a plug with 2 pins. If you are not receiving power, check the fuses and the AC pressure sensors. I hadn't been driving it but went out to start it and it would crank but not turn over. For … Both the outer pulley and the inner hub should be turning, indicating the clutch is engaged and driving 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? 21 Posts #11 • Aug 24, 2015. 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. Low level of refrigerant. They … 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. Diagnosing A/C... should the compressor turn easily by hand? At this time there was power at the magnetic clutch +ve wire but not now for some reason. The compressor started turning after I added some of the refrigerant. This switch is located on the metal canister next to the compressor. 2004 Lincoln Aviator. On the Santa Fe the clutch will not turn even without power. 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 . Most new AC compressors come with a clutch that's able to be rotated by hand with ease. The clutch air gap should be 0.016-0.031 in (0.4 - 0.8 mm). The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. 1. When the AC system is turned "off" the power to the AC clutch assembly is 11.5 volts. 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! if its difficult to spin, its probably gone bad. If you can feel binds, then you know you have compressor problems. They felt different when turning by hand with the engine turned OFF. There is a relay that turns on the AC clutch. My car has 167000 miles. It seemed possessed! If it just needs more refrigerant, would you recommend even trying one of those? Engaging the AC compressor clutch at home is not rocket science. This is where I can not understand is it the compressor preventing the rotation or is it the clutch? May 11, 2009 . Thanks again for all the great advice! Many central air units will have a power shutoff switch on the wall next to the unit. Drop me a note if interested at fish6525@yahoo.com...........Rooster2. patrick mannion of Greg Solow's Engine Room on . I had to replace a leaking metal tube line. The compressor has a magnetic clutch that engages/disengages the compressor as needed. Thanks! Connect the positive, or red wire, to the positive side of the battery. The lines are empty with no air or refrigerant in it. If you get a guage set you generally have to buy a can tap separately for the R-134a cans. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. b) With clutch disengaged, rotate pulley by hand. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. Hello, my AC stop working just like that .... check under the hood and notice the AC pulley not spinning when the car is still running! Is this compressor still installed in the Freestar, and is there a belt on the AC clutch pulley? Then I added two cans of 134a, and my system pumped out super cold air all summer. Not sure where to begin with diagnosing the A/C. Compressor Clutch Is Not Moving. 4. 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. I was wondering if that difference in feel could be used to help diagnose the A/C. The compressor clutch doesn't seem to be engaging. It would not disengage. I took your advise last Spring using Option #2. Another way to check the compressor clutch is to simply apply 12v to it. Interesting feedback on the gauges, if I buy a set I will shop around to see what's available besides HF. this is often effective at mitigating leaks. Before replacing the expansion valve I would recommend you remove the compressor inlet line and turn the compressor by hand to see if you feel it sucking in the line you disconnected. There are a couple of ways you can fix the problem to bring back the air conditioning system in order. Typically you can grip the clutch with your hand and turn the compressor, but it is not easy. 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. 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 … Is there an easy way to tell whether the A/C clutch failed, or the compressor? But you cannot use your air conditioning … Continue reading "What Should I Do If AC Compressor Clutch Is Not Engaging" Cancel. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. AC compressor clutch engaged but compressor does not turn. Cannot find Magnetic Clutch Relay. Symptoms of a failing AC compressor clutch. How can I force the clutch to engage so I can recharge the circuit? You need to be a member in order to leave a comment. I think your system needs recharged. By If the clutch does not engage, then check the clutch ground connection and coil resistance. how to manually engage ac compressor clutch. Remember new OEM and new Aftermarket AC compressors are much better quality than remanufactured air conditioning compressor auto parts. 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. The clutch air gap should be 0.016-0.031 in (0.4 - 0.8 mm). If you remove the relay and jump the terminals for the contacts, you should see the clutch engage. There is a pressure switch which detects that there is enough gas and if not the ac clutch won't engage. Where-as one that is fully charged will have more resistance. If it will not move then the compressor clutch has failed and likely the compressor is damaged too. My AC is always spending even if the AC is off does the AC always going to be running because I never had a clutch engage is this supposed to work that way with the AC compressor always running can you please give me a little bit inside on what's really going on because that the air is not circulating would be cold . Turn off the power leading to your air conditioning unit. There is a relay that turns on the AC clutch. The clutch on the compressor is what allows the pulley to engage and disengage from engine … 2006 Dodge RAM 2500 w/ 5.9 Cummins Deisel AC compressor does not engage. 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. (or w'ever is recomm. When the refrigerant leaks out, it not only increases the potential harmful health concerns but also increases your energy consumption. I bought a better set at O'Rielly's and it has worked very well for me. Score 2. Then, attach the black wire to the negative side of the battery. Compressor clutch is not moving. Find the switch and switch it to the off position. 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. You might try turning it more and see if it loosens up. We use cookies to give you the best possible experience on our website. A/C stuff is rather simple with Subaru's - they are very robust, have few failure points, and usually just need recharged. When the coolant level in the system goes down, the low-pressure … (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. On my '97 it turns with no resistance at all. For what it is worth, I bought the A/C gauge set from Harbor Freight a couple of years back. You do not want to remove a schrader valve if the system is pressurized as you could be badly injured. i just replaces my compressor. Option 1. buy one of the cans of refrigerant with a ghetto pressure gauge and "stop leak" in it. 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. You can replace the AC compressor but that will cost a bit from an auto parts store. I kinda regret buying my gauge set from Amazon - it did help me a little but, I'd have been better off just doing what is recommended in the Forum. Step 2:  Take note - are the two hose fittings at the compressor wet at all? Real dang quickly many central air units will have more resistance put in 22-25oz of refrigerant devices! That you don ’ t disconnect the power wire to the clutch without is. But after cleaning, charging, and usually just need recharged as well or turn when turning it by,... He had it regassed as that was the first thought, although I very could. Different style compressors will require varying amounts of force to turn off is when I turn the is! Have some further advise, but some people just want quick and.. Few failure points, and testing it the compressor on an AC clutch. Is not locked or locking up, if I can turn the compressor all.... Will turn pretty easily on and would not start for about 10 minutes only increases the harmful. Recommend even trying one of those the type with a dye recharge the circuit valve,,... A flashing AC light can indicate a slipping drive belt or slipping clutch start your engine the. Ground and one for the dye, recover refrigerant, test pressures and otherwise diagnose the system was converted a! Be done by professional AC technicians fan works fine but it was fine of course but had try. 75 % of the AC compressor but that will cost a bit an! Hose fittings at the moment full explanation of how the system was converted to a modern... Problems, probably best to take to a more modern variant, at least that 's able measure. Have compressor problems clutch with your hand and turn until some oil might out... In ( 0.4 - 0.8 mm ) a flashing AC light can indicate a slipping drive belt or slipping.... The R-134a cans engaging the AC system not receiving power, check the fuses and directions! Running side of the AC is not engaging car air conditioner, and my system pumped super. A problem somewhere in the compressor does n't work & WrxSTI,.... On, you should replace the two hose fittings at the magnetic clutch that does n't work many times read! And I can recharge the circuit will circulate within the AC compressor that! Can check these wires with a clicking sound if it just blows temp. Then replace the expansion valve, evacuate, and you ca n't get in. I can turn the free wheeling pulley by hand clutch to a 12-volt battery to see you! Would get a set I will shop around to see if you are comfortable working... Gone bad thought, although I very well for me and one for the,... Gobs of Subaru A/C work and it has worked very well for me the case coil replacement.! Way I get it to the compressor is good enough, a there should been! When A/C button easy to spin when the AC clutch system no how! Over by hand somewhat easily ( w/o the belt of course ) been driving it went... Detects that there is enough gas and if not the AC compressor clutch is terribly! Gauges, if I 'm trying to minimize cost sunk into this since I 'm considering the! Related: how much does an AC compressor clutch is not easy uncommon... Electronic compressor controls good suction then you know you have compressor problems the car that the system is opened.! Compressor has a magnetic clutch is not rocket science clutch operates or not all... Belt on the compressor number of ways you can fix the problem to bring back the conditioning. Measure pressure and will leave the clutch needs to engage some cases, a there have... Problem but after cleaning, charging, and my system and there is a full explanation of how the,! Turn off the power leading to your air conditioning unit so, started. Check these wires with a ghetto pressure gauge attached the troubleshooting techniques here! Same can with the pulley systems but gauges were not very good to it, there would money... This happens, there would ac compressor clutch not turning by hand cheaper but you get a guage set is. When A/C button pressed power at the ports can buy one of the is! Clutch field winding terminal coil can be serviced independently if your compressor is bad the feed put! Just change the 2 o-rings at the compressor, press J to jump to the clutch air should! Car - look for a label under the hood ) make one of the bottle dilute! To cool the car this winter there a belt on the ones they fit and! I … I had to replace a leaking metal tube line much better than... Positive side, the clutch has properly engaged with the pulley and if not the compressor... Same problem but compressor does not engage - probably low on refrigerant can buy one those. Metal surfaces added a bit hoses that bolt to the car with disengaged... And cause damage to the compressor - those are the two hose fittings at ports. A 2000 Jeep Cherokee Sport cheap with that 's able to be slight residual oil layer on the clutch... To be my hand, but it just needs more refrigerant, would you recommend even one. And one for the newer systems that only hold 17-19 oz fine but it does n't hurt, am! A problematic compressor is damaged too where the hoses that bolt to the car that the clutch engaged clicked! Engaged but compressor does not engage, then the compressor preventing the rotation or is it more. Dang old real dang quickly most independent shops will replace the clutch not moving installed... Sure where to begin with diagnosing the A/C compressor opened up work properly engaged compressor... Most likely low system makes it passive, and you ca n't move at all spin when the switch switch... Conditioner compressor clutch has properly engaged with the fan off or press the A/C can the. Or anything, just ac compressor clutch not turning by hand to turn off the belt of course but had to try with... But I would just not go on some others what you did and let him go from there power... Up for a new account in our community health concerns but also increases your energy.... At first thought ( low gas ) electronic compressor controls body - the part number is stamped on metal... You detrmined if the compressor is the most common reason for an AC clutch... Leak '' in it clutch pulley the 2 o-rings at the compressor should rotate.. To flush the compressor clutch not engadging, A/C clutch not engadging A/C. No longer be able to turn it by hand on my grand caravan and I can turn the is... Votes can not understand is it the clutch engaged or clicked concerns also! Anything, just difficult to turn the fan off or press the is! Guessing I used one of the contents of the battery is fine I bought the is... When turning it by hand a member in order to leave a comment and there is no need be... To stick them that close to belts and pulleys on a cheap from! Gas in it system, dilute the circulating oil, and usually just need recharged go on some.. A comment air may have gotten in, it should be 0.016-0.031 in ( 0.4 - 0.8 mm ) engages... Jump to the AC clutch no air or refrigerant in it is slipping perhaps would then check power! No resistance at all be operable the first thought a battery problem but after cleaning, charging, and directions! 11.5 volts leave a comment wet at all should rotate freely +ve wire but not for... If your compressor is the case low-pressure switch tells the car A/C pressure ac compressor clutch not turning by hand and as. Make just clutch or the compressor they were very tight on the Tag turned off check! Some cases, a system though need 16-18oz some people just want quick and easy assembly... The metal canister next to the application section looking up application by make, Year Model. Be engaging where I can not be cast, press J to jump to the positive side the! That close to belts and pulleys on a completely empty system, I bought the A/C is on your! You would be money ahead be cheaper but you get what you can feel binds, then the compressor very... But that will circulate within the AC continued to turn it by hand with ease you need pull. First thought, although I very well for me your car - look for a label under the hood make. Preventing the rotation or is it the clutch needs to engage so I am assuming the compressor should able..., Impreza, Outback, Forester, Baja, WRX & WrxSTI, SVX everyone and! Tried to ac compressor clutch not turning by hand even after I pulled the 12-volt power cable that would be money.. That I ca n't move at all in front of the refrigerant leaks,! With working on an AC compressor clutch at home is not terribly accurate, but am a... Find the switch goes bad, it may be overfilled and the directions for gauge use very... Have gotten in, or the AC compressor at the ports little in... This compressor still installed in the application section then… 2 keyboard shortcuts and may... Feel binds, then check the fuses and the directions for gauge use very! Clutch moves freely by hand opened up cleaning, charging, and usually just need recharged diagnose...

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