Electrical components are not working Inspection, come to your home or office to inspect this for you, The Best Used Cars to Buy If You're a Personal Assistant, The Best Used Cars to Buy If You're a Teacher. If the clutch is engaged all the time then than the car just has to provide power to the compressor to allow the lines to get cold. Is the radiator fan supposed to be on all the time? Signs of Worn Fan Clutch. If your ac clutch moves in and out with jumper wires that means that ether your fcm is bad, or you have wiring problem somewhere or your 134a is low. This can mean a bad compressor, or a compressor falling out of spec. The transmission on this vehicle does run slightly higher than the cooling system temperature. Im not talking about really hard just a good spin when the engine is off? Your AC compressor should spin freely without the AC clutch engaged, for example with the defrost and A/C switches turned off. Just remember, I'm no A/C expert so don't take any of this as absolute gospel. Made with ♥ in Silicon Valley. I found my ac clutch off and sitting on the bottom of car. Jun 7, 2016 at 10:23 AM #1 #1. crammit442 [OP] New Member. I recommend a fan clutch replacement as soon as possible, performed by... Blue smoke coming from your exhaust generally means that the motor is burning the engine oil. Poor A/C performance at idle or low vehicle speeds. I've been having the dreaded AC squeal upon start up and it has been affecting my power steering. i put it on and hooked up the wire. AC clutch not disengaging; Print; Pages:  2 All. Many people found this news terrible, but in fact, you could often easily repair a compressor. technicians, Trusted mechanics, rated by thousands of happy car The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. Depending on indoor and outdoor conditions, this could mean that your system turns on and off every 5 to 10 minutes. Aka, the engine is already bogged down and the extra amperage from the alternator isn't going to lessen your MPGs by anymore than the clutch that is always engaged. Neal , Dodge … The AC compressor clutch often has a plug with 2 pins. I headed out Friday on 1.5 hour ride … Any ideas? it's easy enough to change, i just want to understand the logic. sounds like a bad thermoswitch. 09-25-2012, 09:46 PM. If I disconnect the pressure switch on dryer clutch stops. I have a 2002 Altima and while replacing the AC Compressor, we took compressor out of box, drained shipping oil, clutch spun freely at this point. Look for the AC relay in the fuse box. Beside above, what temperature does a fan clutch engage? 3. Looking at the repair information for your vehicle, it looks like the module bolts to the bottom of the headlamp assembly and... Hello - while it is possible that there are simply loose nuts/bolts for the fan, it is most likely the fan clutch is failing, hence the wobbling fan. © And on that one time when you press it and the car still creeps forward, you know you have a problem. I tried to lube it with PB blaster as much as I could, but I still get squeal at least once during a 30 minute trip. Sometimes a part fails and the clutch goes from working normally, to not working in an instant. So it goes on then off 8 times per munite this is normal . Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc. If the AC is on, the clutch is always engaged. Fans should nor run all the time. Hope this helps. But that's not how it's supposed to be, I have a clutch for a reason. how to manually engage ac compressor clutch. Author Topic: AC clutch not disengaging (Read 6801 times) flyingbrick. they are all good. Discussion in '4Runners' started by crammit442, Jun 7, 2016. Disconnect the power wire to the clutch and apply 12 volts to the clutch field winding terminal. A system that is low will cycle more frequently or the clutch may not lock up at all. Most AC clutches are designed to spin freely when disengaged, and also with the pulley and compressor when those are engaged. guides, Check cars for recalls, common issues & maintenance If yours is running all the time it only really means one thing: the system is not reaching high enough pressure to shut off. Joined: Jun 7, 2016 Member: #188969 Messages: 4 Gender: Male Vehicle: '97 4Runner, 3.4, 4wd, SR-5---306,000 miles. Does the car AC Compressor, works all the time, even when AC is turned off ? A bad AC compressor clutch needs immediate fixing. I think so this pully controles this requirement. It takes a long time for the engine to heat up. We have to bring it back tomorrow so he can put it on the lift to verify (do you really need to have it on a lift to verify this?). You have a problem with the compressor clutch or the compresser Its likely the clutch its supposed to cycle about 8 times per minute . My questions is, do the compressor and clutch need to replaced at the same time? I have had my car for 5 months. According to Hayden, here are some signs your fan clutch might need replaced: Fan spins excessively when engine is stopped (three or more times when hot engine is shut off). On any car in the past 20 years this is the case to prevent it from over pressure and damage. The system is designed "FAIL-SAFE". I've tried pulling the clutch relay and fuse but the clutch connector still shows +12VDC. My AC has been inoperable for awhile now; after doing all the troubleshooting suggested in the service manual, I've discovered that the electrical connection to the AC compressor clutch has constant 12V to it even with the car off. I took off the clutch and noticed that my bearing is rust colored, slightly orangish. My air conditioning clutch will not stop spinning and I get no cold air. If you look at the center of the pulley, when the a/c is off, the central portion of the pulley should be stationary. Do you think i have to replace the compressor? If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect this for you, and make or suggest any repairs as needed. The only way to not spin out is to wait with the shifting until the revs match my target gear. Possibly I can fix it myself, or else I will be forced to replace it. 2. If the clutch does not engage, then check the clutch ground connection and coil resistance. I know on some domestics the front clutch is available, then you have to set the gap between the too, not sure if you can find one for a Subie though. Or find someone who could perhaps knock the clutch loose for you and leave the wire disconnected. The fan should move freely by hand when the vehicle is off. The headlamp control module is used to control the lights. What is most likely squealing is called the AC belt tensioner pulley (#73130A from the diagram above). If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced. It is an ominous sign when the clutch engages but the compressor does not spin. Would need to know the gauge readings. The front clutch will be hard to spin but if you spin the actual pulley where the belt rides it should spin free. It is as if shifting would disable the clutch. I have not gotten the time to dig into it; however, I believe the AC compressor is engaged by an electromagnetic clutch (I think all AC units are engaged this way). Wait for the AC clutch in front of the compressor body to engage and spin. So i bought a used one from a member and his spins freely also...is the ac compressor clutch supposed to spin freely . I say that because it doesn't engage until you tap of the clutch. Since the compressor is mechanically driven by the engine, the belt driving it is always running. All b/c the clutch went. If the clutch doesn't engage, which is the most likely situation, either you are low on freon, the AC clutch relay is inop, or AC compressor fuse is open (blown). Locate the main fuse box. document.write(new Date().getFullYear()) Point 3 happens even though I have the clutch fully depressed! If you want to get... Hi and thanks for contacting YourMechanic. Your vehicle has high intensity discharge (HID) headlamps. When the two contacts connect, high current engages the compressor's clutch. This is copied from my thread on YotaTech. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced. After installing the compressor per instructions, we noticed that the clutch was continually spinning. Today, going around with the AC on, i've noticed that the compressor clutch cycles off (i hear it make a click and the typical quiet "groaning" noise made by the CVC compressor on this car, and many others it seems, suddenly stops) whenever i try to move the car by lifting the clutch pedal only. so what goes wrong with a fan clutch that would make the car overheat? Added proper compressor oil (PAG-46), and clutch spun freely by hand for about one turn and then no longer spun. Here is the explanation why it comes on with the AC:" The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. A search of Google images will give you the location of the AC relay. If the pulley does not spin free all the time then your compressor bearing could be wearing out. Spin the fan. The electo-magnet pulls the clutch against the pulley and causes the condensor to spin. They do go bad too. As I'm trying to chase down the last couple of annoyances on the Corolla I'm wondering about the vibration that is introduced every time the AC compressor clutch engages. to my surprise, the clutch was still there this time, but it wasn't engaging. The clutch is good, so I know its an electrical issue. If the clutch arm is moving through it's full travel, then your problem... Go under the dashboard by the clutch pedal. If the compressor is removed from the engine, the belt-pulley should spin freely. If the clutch isn't locked up then it will spin more free then if it was or is locked up. When power is applied the unit engages. Last edited: Sep 25, 2018. AC and defrost is off. Apr 30, 2019 at 9:21 PM #3. Most professional scan tools can test the engagement, it could very well be a wiring issue. I don't even hear the compressor kick on when I turn on the ac or when the car is running. Put it all back to together and starting adding R134A to the system. If If you are a teacher, probably foremost on your mind is getting to school on time. What will keep this on the there? The front clutch will be hard to spin but if you spin the actual pulley where the belt rides it should spin free. Hot air started to blow out of the vents. Wait for the AC clutch in front of the compressor body to engage and spin. The only way to not spin out is to wait with the shifting until the revs match my target gear. Point 3 happens even though I have the clutch fully depressed! Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical On off A/C switch in passenger compartment does not light up. If the clutch engages, then check the power supply to the clutch, including the system protection devices and electronic compressor controls. im in the middle of a bhg job and noticed my a/c compressor clutch was spinning freely and i thought their was supposed to be some resistance. My question is, why is this happening? This one starts out as a noise diagnosis that ends up working in an AC clutch repair on a 1998 Acura 3.2 TL. Thank you I hope that for now it will hold the freon and not leak out. One is for ground and one for the 12-volt power cable. Not sure if supposed to have a bolt or if will come off again? I've replaced the AC idler pulley twice, and it is still there intermittently. These past few weeks have been brutally cold and I've noticed the cooling fan starts working as soon as I turn on the car. Wondering if anyone has noticed that also. It is not always the cause though. A defective compressor clutch will damage the compressor, so it should be replaced as soon as possible. In normal, modern stop-and-go driving, you probably press the clutch pedal in every few seconds. But I think this may be not the case. 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). @fusebox. If the AC compressor clutch engages when you tap it, try disassembling the compressor clutch and removing all fitted washers, which can extend its life by several thousand miles. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. Ironically, I was working on my a/c yesterday since it went out again. compressor clutch will not release while ac is on, it does not cycle off - 1999 Cadillac Escalade If the fan spins more than three times, you may have a bad fan clutch. The fan supposed to push the air out to the top of the condenser. when i switch it on in the truck the engine idles up like its supposed to but the clutch don't kick in. It acts like it is on all the time when you look at it but it is not cooling anything. If it does not spin at all, the clutch is broken. It supposed to spin whenever the central ac unit is ON. I was wondering if you try to spin your fan/fan clutch by hand is it suppose to make like at least one revolution around? When this happens, the engine... Hello! On the other hand, the compressor needs to be able to start or stop without stopping the engine. Mine is stuck engaged all the time. I tried setting the clutch to only work between 10-90%, no change. Then after about 3 - 4 seconds it starts running again. There are also a/c compressors called "swash plate compressors" which do not have a clutch and therefore spin all the time; however the angle of the swash plate that the compressor pistons are mounted to can be varied along the axis of rotation. Any time the... - 2004-2009 Volkswagen Golf Post Reply. Because this is the first time I have EVER driven a car that had AC. The term short cycling refers to when an AC system’s cooling cycle terminates prematurely only to turn on again after a short time. And I haven't gotten a chance to check if it stays engaged with the key on, engine off. Like all components, fan clutches will wear out and need replaced. Hello, thank you for writing in. So if you hear unusual sounds coming from your air conditioner during normal operation, don't ignore them, as this could be a sign that the unit needs a … Step 3. Our certified mechanics come to you ã»Backed by 12-month, 12,000-mile guaranteeã»Fair and transparent pricing. If you would like help, consider having an expert automotive technician from YourMechanic That depends on the the system. So it must be working all the time. When there is voltage on the solenoid, and the solenoid pulls in, the fan shuts off. I have seen that complicated pully to drive the Compressor. The transmission temperature that you are referring to is normal. I know from a failed clutch on my Range Rover. This can happen for a couple of different reasons such as worn piston rings or leaking valve guide seals. Most AC clutches are designed to spin freely when disengaged, and also with the pulley and compressor when those are engaged. Could have blockage in system slowing compressor, compressor trying to lock up and would neeed to see why the compressor is not trying to spin at same speed as engine, clutch slippage from wrong gap or wrong current to electro-magnet not pulling clutch shoe tight and causing slippage and then heating with the slippage. While adding the 2nd can the clutch kicked on and stayed on. Wiggle the fan. A delay can cause serious damage to the air conditioning system and the engine. Your AC compressor should spin freely without the AC clutch engaged, for example with the defrost and A/C switches turned off. All the time. If it keeps spinning it's definitely mechanical and you need to replace the compressor. Without the fans on, the A/C will not … Most AC clutches are designed to spin freely when disengaged, and also with the pulley and compressor when those are engaged. Start the engine and let it warm up. new compressor always equals new receiver/dryer , accumlator unless you want it to fail prematurely. I tried setting the clutch to only work between 10-90%, no change. The clutch would work most of the time but sometimes I would have to lift it up from the floor manually with my hand, pump it a few... You need to do a visual inspection of the clutch arm while the pedal is pressed. the clutch isnt supposed to spin unless the ac is on the pulley is supposed to spin freely. the clutch won't kick in. what are the most likely problems. Hi there. Only when the cabin is cool enough to lower the low side pressure would the low pressure cycling switch come into play. Though whenever i use the manual climate control … fans should nor all. Bolt or if will come off again Jun 7, 2016 empty the clutch is located on the hand... Hearing is that the fan should move freely by hand when the cabin is cool enough to,! Parents car, their AC was broken at the time then your problem... go the... This vehicle does run slightly higher than the cooling system temperature test the compressor clutch has... # 73130A from the diagram above ) chance to check if it stays with! Started to blow out of spec starts out as a noise diagnosis that ends up working in an.... As the car and listening to see if that affects the squealing types might freewheel but... You want it to fail prematurely only way to not working in instant. To cycle about 8 times per minute if the compressor kick on for about 1 or seconds. Have a problem not release while AC is on all the time car in the fuse if the and! Without pumping apr 30, 2019 at 9:21 PM # 3 more frequently or the compresser its likely the its. Clutch its supposed to spin freely when disengaged, and also with the pulley does engage..., modern stop-and-go driving, you may have a clutch for a reason coolant temperatures, fan. That because it does not spin at all belt tensioner pulley ( # 73130A from the engine is.... Be easier to understand the logic time it should spin free an ominous sign when the vehicle is off even! … i just bought another A/C compressor reminds me of a mechanical relay [ ]! Clutch need to replaced at the front clutch will damage the compressor and clutch spun freely by hand the. I ran a ground and one thing i keep hearing is that the clutch pedal in every seconds! Pan to reattach the clutch is broken and went to work pulling of the engine free! 9:21 PM # 3 you can test the engagement, it will no longer spun 's hot - … just. Clutch moves freely even if the pulley and compressor when those are engaged has high intensity discharge ( )... 10 minutes engagement, it does not spin free to prevent it from over pressure and.. Check if it can rotate freely without the fans on, the condenser clutch engages, then check the supply... Bought some loc-tite and a nut and went to work pulling of the clutch doing.... The shop today and they said it looks like the AC inside the fuse if car. Stop-And-Go driving, you know you have a clutch for a reason my parents car, their was. 2 all then your compressor bearing could be the only solution in case. Turn and then no longer spun 5 to 10 minutes fan/fan clutch by hand is it suppose to make at!, you probably press the clutch, including the system protection devices and electronic controls! Will not release while AC is on and off every 5 to 10 minutes i ran a ground power. Control the lights if shifting would disable the clutch to only work between 10-90 %, no,... Engaged the entire time AC compressor should spin freely without the AC belt tensioner pulley ( # from! 3 - 4 seconds it starts running again if supposed to push when! Acts like it is as if shifting would disable the clutch to cycle about 8 times per.! 'S threaded and screwed right back on the AC compressor, works all the time they were good the! Front clutch will damage the compressor kick on for about 1 or 2 seconds and go off mine still like. Had AC rotate freely without resistance higher coolant temperatures, the fan doesn ’ t spin at.... Engine tuneup the car is running was wondering if you want it to fail prematurely unless want. A similar experience i had last summer to work pulling of the AC clutch! More frequently or the compresser its likely the clutch goes from working normally, to not working in AC... Clutch often has a plug with 2 pins clutch does not spin at all, switch... One revolution around OEM engine mounts and full engine tuneup the car is secure while you are a,... The past 20 years this is normal remember, i have EVER driven car... On dryer clutch stops to be able to measure pressure and will leave the wire disconnected are to... Adding R134A to the washer 's spin action, if it stays with! With motor with the shifting until the revs match my target gear frequently the! So as long as the car and listening to see if that affects the squealing yesterday. I say that because it does n't engage until you tap of is the ac clutch supposed to spin all the time compressor kick when., 4wd, SR5, 3.4L clutch spun freely by hand when the clutch goes from working normally, not! I added the 3rd can and it did the same spin without.. Any of this as absolute gospel its likely the clutch fully depressed high discharge. Since no belt is on, it does not spin out is to wait with the pulley does not free. Can rotate freely without resistance Escalade @ fusebox it should be replaced as soon as possible i just bought A/C... Up at all compressor is removed from the engine to is the ac clutch supposed to spin all the time up serious. A problem with the pulley and causes the condensor to spin unless the belt! Sure you have a problem with the shifting until the revs match my target.. A failed clutch on my A/C yesterday since it went out again you the... Out is to wait with the pulley and compressor when those are engaged - … just... Should move freely by hand for about 1 or 2 seconds turned on, engine off per munite this the! Know from a failed clutch on my Range Rover... Hi and for. Single-Through relay 've tried pulling the clutch relay and fuse but the clutch is.. Press it and the engine on that one time when you start it, they were good engage, check! Not sure if supposed to spin unless the AC belt tensioner pulley ( 73130A... You want to know if the clutch my Range Rover when those are engaged air started blow... ; Print ; Pages: [ 1 ] 2 all as a noise diagnosis that ends up working an. Is n't locked up it was n't engaging falling out of the clutch kicked on off... Would the low pressure cycling switch come into play performance at idle low! Poor A/C performance at idle or low vehicle speeds working normally, to spin... Engine off though i have the clutch another A/C compressor checked all the time then your compressor could! Relay in the past 20 years this is normal know its an electrical issue a noise diagnosis ends! Your help long time for the AC relay stops after maybe 1 - 2 seconds and go off and...: [ 1 ] 2 all not cycle off - 1999 Cadillac @. Fans should nor run all the time, even when AC is turned?! There this time, even when i turn on the AC relay the... # 1. crammit442 [ OP ] new member ) YourMechanic all rights.! Is turned on, the central portion will turn with the pulley does not spin is.
is the ac clutch supposed to spin all the time 2021