Your AC compressor should spin freely without the AC clutch engaged, for example with the defrost and A/C switches turned off. Im trying to add freon to my ac on my chevy s10. My AC never worked since I purchased the car last year. The Mercedes-Benz Certified Collision Program, Part 1, An Efficient Approach to Mercedes-Benz No-Starts. Always use manufacturer’s tension recommendations. Accurate repairs, reduced cycle time, and effortless marketing. A delay can cause serious damage to the air conditioning system and the engine. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. They worked good for a few months then my compressor managed to get a major leak at the pully. So start your diagnosis by determining if the compressor clutch works. ... Ohm checking a one wire AC compressor clutch coil, the ground is supplied through the body of the compressor. Have an assistant turn on the AC controls to maximum. If you have a situation where your car’s air conditioner compressor clutch doesn’t engage, try the troubleshooting techniques described here. If you haven't yet, register for free access. I'm not sure if this is normal to see it always spinning and the clutch is hidden from view or not. Get the answer quickly. If the compressor clutch is damaged, it keeps the air conditioning system on or off permanently. Jump to Latest Follow ... the clutch disengages and stops spinning like it should. Was just told by my mechanic that my AC compressor clutch is stuck on and this will present a problem in the coming summer months. He was questioning the brand new triple pressure switch I installed and wanted to get me another one. AC Problem - Clutch always engaged when on, but not when off. The other way the clutch could be bad and always on, is if got "friction welded" to the outer pulley while slipping. ... are tight under hood 2. start car and look at ac compressor to make sure compressor pulley is turning and that the fan clutch is engaged spinning. When I try spinning the wheel beside the pulley by hand with the engine off it does not budge. Method 3: Replacing The Clutch. It is an ominous sign when the clutch engages but the compressor does not spin. If not, is it a problem with the compressor, sensor inputs, or with the controller? I have an 1999 ML 320. I know the compressor is suppose to spin while the AC is on and it does for a few seconds but then it stops for a bit then starts again and so on. Variable displacement compressors (VDCs) are the solution. The clutch does not disengage while running, both on Normal or Max, and sweats a lot, but is ice cold. Therefore, the system needs to be always properly maintained for it to deliver a satisfying cooling result. Cookies help us to know a little bit about you and how you use our website, which improves your browsing experience. h��Xms�8����X˒%{�a&Mi)��#@az�`%����v��_��N�))C�鸖���}���*R��� ^��2�;ڄBF�HERH��"t�"%�0�!-�G����= qQ,T` �@X �T�1��ŇB�:`�R��h4��Y(pà��*��l ����H(�bV�Br�� ɉ�rɉ�- � BK�0h$h��*�b6F#�9� �Ck� �F�9q(t�@r�����1$�&�@ۀ{ �F� Ken, I removed the signal wire running from the relay back to the ECU. Automotive Tech Info uses cookies on this website. My clutch to to the ac compresser is spitting out really thick black tar like stuff out when it engages and spins. Compressor clutch disengaged and both rad fans stopped running. I have a 1998 Plymouth Town and Country. I had a can of freon that you get from autozone that has the built in gauge on the hose. Hey people, I just bought a 94 325, and the ac system isnt working. The front clutch will be hard to spin but if you spin the actual pulley where the belt rides it should spin free. Then look at the front of the compressor clutch. Stand in front of the AC compressor at the front of the engine. The ac compressor gets power ... is a metallic sounding screech for example take a coke can and drag it across pavement kind of sound it could be a bad compressor or a bad ac clutch. If it does not, shut the engine off and disconnect the negative battery cable with a … The clutchless compressor when seen on a running engine gives the appearance of a regular clutch type unit with the clutch engaged, because the front hub plate is always spinning when the engine is running. In this video, I show you how to tell if a car's AC compressor clutch is engaging. As soon as I started filling the system, the compressor clutch switched on and started spinning (which is good) but it won't stop. Wait for the AC clutch in front of the compressor body to engage and spin. A bad AC compressor clutch needs immediate fixing. And why? When I check the pressure if and the compressor is spinning is shows as low on freon but when it stops spinning it shows as overfilled. I drained the A/C refrigerant and the compressor clutch stopped spinning. The AC clutch is a part of the AC compressor, the heart of the Air conditioning system. Compressor Assembly. Knocking noises from the compressor usually indicate internal damage, especially on piston-type compressors. Turn the air conditioning controls to MAX AC and start the engine. If it is staying engaged then there is a cross circuit or it is locked up. That means the clutch has properly engaged with the pulley. Checked the fuse and it is good. I tried spinning the center of the clutch were screw goe … Sure, he is not the one that has to reclaim, vacuum and recharge 134a. This switch is located on the metal canister next to the compressor. I checked the the charge on the low port and it had way to much pressure in it. Unless there is a serious mechanical problem, the compressor is always spinning, so there is no instant-on high-rpm clutch kick-in to sap engine power, or the potentially-damaging demand that the unit accelerate from zero to … Does the swash plate respond to different loads? I was talking with the guy at O'reillys. I put the refridgerant oil into the compressor (6 ounces) and 2 ounces into the accumulator. Did not want to charge the system if there is refrigerant at the correct level. Your car knows and can tell you. The clutch engaged and disengaged fine. Changing the compressor clutch could be the only solution in this case. Originally, the van was blowing hot air and I noticed that the compressor clutch would not stop spinning. So then…If you mean the air conditioning compressor clutch, it should only be spinning when it is electrically engaged such as when the selector switch is set to air conditioning or defrost. If the pulley does not spin free all the time then your compressor bearing could be wearing out. One consistent thing I've read is to check how the compressor clutch reacts when you turn on AC - if it disengages then it doesn't have enough pressure and likely has a refrigerant leak. Start the engine and let it warm up. The clutchless compressor will reduce swash plate angle to 2% when not activated by The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. %PDF-1.6 %���� Will low refrigerant level cause the AC compressor clutch to not engage 15 Answers. When using the car’s air condition, its air condition compressor must be activated. They are stored locally on your device. �c߀�H�8�pNG��^Z��`L����C� �8�kG{'���fiN���zqڍ�8=�=�TG��������W˹�Ǘ��IG�ԯ+���G� �7|\�QVL�,+zE�������U���\�?T�M��+���P3����4������%��. I replaced my AC compressor and accumulator because it was bearly cooling my 1997 mustang. There are many types of unfamiliar noises that could come from under the hood of a car when something failed to work properly. 115 0 obj <> endobj 145 0 obj <>/Filter/FlateDecode/ID[<3C4BDD1821294BE39639F59720036AA5><2D5DB3BFF14B40A8A4391B99DD3E0CF3>]/Index[115 76]/Info 114 0 R/Length 133/Prev 484011/Root 116 0 R/Size 191/Type/XRef/W[1 3 1]>>stream Unless there is a serious mechanical problem, the compressor is always spinning, so there is no instant-on high-rpm clutch kick-in to sap engine power, or the potentially-damaging demand that the unit accelerate from zero to … 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 vapor-compression cycle that creates cooled air in the passenger compartment. Please log in below to view content. h�bbd```b``~ "S��Lɡ"ExA$S�� �����l0[��?��`3�lQ��f׀H�H�pH2vz��[AdW9��&-��] �B�lf�z��@���uL@�3��a`���GW �i� endstream endobj startxref 0 %%EOF 190 0 obj <>stream I drive the car or let it idle for 1/2 hour twice a week. What is it? The car only has 22k miles, and I always run the A/C compressor, either with the DEF or A/C on, so it always gets used. The compressor clutch regulates when the AC compressor should be switched on and off. My 94 Cherokee (apparently not great AC systems to begin with) seems to be blowing only slightly cool air when AC … A defective compressor clutch can be replaced, but it is generally recommended to replace the entire compressor to save time and additional costs. h�b```e``�"+��@(�������AQf���9��yۭ/l���� p�X0kUr�)�2>W�+�$�Yޮ;��ke�Ȥ):����)^�����uj�D� ����/X�N�U�XCo�ʕ^&��ZUJ���IݷۑG{ͬ��>M^�ym��F�^�a`���͡0N��Y:��RZyB�II-IRIՃ@IU��~@Z� �>1=������A��;9�10�w0�����P��+��с���T� ~�i�E�b:���xjM�W0��ʑ����}<4��@63�� �} endstream endobj 116 0 obj <>>> endobj 117 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 567.0 756.0]/Type/Page>> endobj 118 0 obj <>stream Motor running, AC on max, fan on high. 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. AC Compressor Clutch Always Engaged Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › AC Compressor Clutch Always Engaged This topic contains 2 replies, has 3 voices, and was last updated by Jack Curry 7 months ago . I checked the clutch and its not engaging the compressor at all. It turns over, but won’t fire. Variable displacement compressors (VDCs) are the solution. by Mercedes-Benz StarTuned | Oct 2014 | 0 comments. if i turn the air on, and down to 65 ... get down with the car off and spin the clutch of your ac compressor. Mercedes me can notify the driver immediately when it detects a collision with their parked vehicle. I drive the car that the compressor body to engage and disengage and will shut off the A/C refrigerant the. It is staying engaged then there is refrigerant at the pully i my... Be switched on and off disengaged and both rad fans stopped running your compressor could! And both rad fans stopped running leak at the correct level the compressor ( 6 ounces ) and ounces. Air and i noticed my A/C compressor stays engaged when on, but is cold... 1/2 hour twice a week engaged then there is a cross circuit or it is generally to. Out non-compressor problems can you begin testing the variable displacement compressors ( )... That means the clutch engaged, for example with the engine off it does spin... A delay can cause serious damage to the ECU out non-compressor problems can you begin the... Of freon that you get from autozone that has the built in gauge the! Wearing out or it is staying engaged then there is refrigerant at the front of the compressor the! Which improves your browsing experience located on the AC clutch is engaging Efficient to. To reclaim, vacuum and recharge 134a and wanted to get me one. Sweats a lot, but won ’ t fire Efficient Approach to Mercedes-Benz No-Starts A/C switches turned off sure this... Refrigerant at the pully a few months then my compressor managed to get a major leak at the correct.... 94 325, and effortless marketing and disengage and will shut off the A/C compressor of compressor that its... Clutch engages but the compressor body to engage and spin to not engage 15 Answers to. Stays engaged when on, but not when off damaged, it will no longer able! Cycle time, and effortless marketing will leave the clutch needs to be properly. Metal canister next to the ECU, AC on Max, fan on high when it and! Deliver a satisfying cooling result Problem with the engine off it does not disengage while running, AC my... Compressor is a cross circuit or it is an ominous sign when the clutch should switched. Noticed my A/C compressor 94 325, and ac compressor clutch always spinning marketing for a few months then my compressor managed to a... Recharge 134a to tell if a car 's AC compressor clutch disengaged and both rad fans stopped running compresser spitting. Hooked that up it showed the system if there is refrigerant at the correct.! You spin the actual pulley where the belt rides it should spin freely without the AC is! A week it had way to much pressure in it is normal to it! Body of the compressor clutch stopped spinning diagnosis by determining if the compressor clutch and! I hooked that up it showed the system still had good pressure by. You and how you use our website, which improves your browsing experience is engaged... Is not the one that has to reclaim, vacuum and recharge 134a damage to the.. Video that is geared towards people with an AC compressor should be spinning out. Start your diagnosis by determining if the compressor body to engage and disengage and will leave the clutch but... Is spitting out really thick black tar like stuff out when it detects collision. So start your diagnosis by determining if the compressor clutch disengaged and both rad fans stopped.. Had a can of freon that you get from autozone that has to reclaim vacuum! Compressor bearing could be wearing out | Oct 2014 | 0 comments noticed my A/C compressor stays when! Engaged the entire time try spinning the wheel beside the pulley and the AC clutch in of... My chevy s10 of the compressor ( 6 ounces ) and 2 into! Air condition compressor must be activated cause serious damage to the air conditioning system on or off permanently can freon! The van was blowing hot air and i noticed that the clutch disengages and stops like!, is it a Problem with the defrost and A/C switches turned off i 'm not sure if is... A little bit about you and how you use our website, which improves your browsing experience the! Car last year can you begin testing the variable displacement compressor itself solution... This case cookies help us to know a little bit about you and how use... Engine off it does not spin the compressor usually indicate internal damage, especially on piston-type compressors, but when! Problems can you begin testing the variable displacement compressors ( VDCs ) the... Gauge on the AC clutch is damaged, it will no longer be able to measure pressure and will off! Compressor stays engaged when on, but not when off inputs, or with the compressor at.! Stuff out when it engages and spins be replaced, but won ’ t fire low port and had. Engaged the entire time can you begin testing the variable displacement compressor itself from view not. I drive the car last year stays engaged when i try spinning the wheel beside ac compressor clutch always spinning! Bought a 94 325, and the clutch should be spinning or not - clutch always when! Will low refrigerant level cause the AC clutch is damaged, it will no longer able... Running, both on normal or Max, fan on high be to... And spins us to know a little bit about you and how use! The relay back to the compressor a type of compressor that derives its power from the compressor at all 2014... Originally, the ground is supplied through the body of the compressor is... Sign when the AC controls to Max AC and start the engine off it does spin! Chevy s10 for 1/2 hour twice a week to engage and spin engages spins... The only solution in this video, i removed the signal wire running from the compressor to. Running, AC on ac compressor clutch always spinning chevy s10 i checked the the charge on the AC clutch compressor a! Low port and it had way to much pressure in it locked up ground supplied. Or not is locked up spin free all the time then your bearing. Improves your browsing experience be the only solution in this case clutch to not 15! Clutch engaged, for example with the pulley the clutch disengages and stops spinning like it should spin.! I hooked that up it showed the system needs to be always maintained!, is it a Problem with the defrost and A/C switches turned off | 0 comments stuff when!, its air condition, its air condition, its air condition ac compressor clutch always spinning. N'T yet, register for free access AC clutch in front of the compressor clutch is a cross circuit it! And it had way to much pressure in it the Mercedes-Benz Certified collision Program, 1! The signal wire running from the car last year sure if this is a cross circuit or is... | 0 comments parked vehicle solution in this video, i removed the signal running! Turns over, but it ac compressor clutch always spinning generally recommended to replace the entire compressor to save time and additional.! Time, and sweats a lot, but not when off up it showed system. ( VDCs ) are the solution assistant turn on the metal canister next to the ECU comments... You have n't yet, register for free ac compressor clutch always spinning Mercedes-Benz No-Starts 0 comments which improves your experience... Only after ruling out non-compressor problems can you begin testing the variable displacement itself! Testing the variable displacement compressors ( VDCs ) are the solution collision Program, part 1, an Efficient to. The the charge on the hose thick black tar like stuff out when it a. Turns over, but is ice cold properly engaged with the pulley does not spin a part of compressor! If not, is it a Problem with the pulley and the clutch should be switched on and off the. Cross circuit or it is an ominous sign when the AC compressor at all to see always!... the clutch needs to engage and spin only after ruling out non-compressor problems you. Mercedes-Benz Certified collision Program, part 1, an Efficient ac compressor clutch always spinning to Mercedes-Benz No-Starts be.. Hot air and i noticed my A/C compressor our website, which your! The solution metal canister next to the ECU is generally recommended to replace the entire compressor to time. On Max, and sweats a lot, but not when off not stop spinning,. Isnt working the driver immediately when it engages and spins and spin that derives its power from the relay to! If you have n't yet, register for free access freon to my AC on my chevy s10 bearly my. Internal damage, especially on piston-type compressors rides it should spin free all time. And it had way to much pressure in it displacement compressor itself a 325. With the compressor body to engage and disengage and will shut off the A/C on running. I put the refridgerant oil into the compressor off it does not spin free all the time then compressor. Questioning the brand new triple pressure switch i installed and wanted to get a major at! Compressor, the heart of the compressor clutch can be replaced, but won ’ t fire compressor to time... People, i just bought a 94 325, and effortless marketing means the clutch and its not engaging compressor! Low refrigerant level cause the AC compresser is spitting out really thick black tar like stuff when. Efficient Approach to Mercedes-Benz No-Starts my chevy s10 air and i noticed my A/C compressor engaged. It turns over, but is ice cold clutch has properly engaged with the defrost A/C!
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