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Use only compressor oil that is approved by your AC’s manufacturer. My clutch did not disengage when I was going to work yesterday. pushrod on . Ohm checking a one wire AC compressor clutch coil, the ground is supplied through the body of the compressor. AC compressor not disengaging! Eventually the friction material will burn off and the clutch release bearing will seize and collapse. Here, you can learn what to do during a situation like this. The single function switch interrupts compressor function if system pressure becomes too high. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. The clutch either transmits power or not, and it does not work partially. The oil level of the compressor can easily be seen from its sight glass. It was engaging and disengaging (30-50psi) fine before I added the oil. The Low-Pressure Switch. Search Auto AC Forum Archives. Ben LeDoux is a student at Front Range Community College in Westminster, Colo., where he writes for the "Front Page Newspaper." If you are sure that the system is overcharged, bleed the refrigerant slowly using the discharge valve located near the gauge. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. The general use of clutch in the car is to engage and disengage drive train to transmit the power. My ac compressor clutch keeps engaging and disengaging and not blowing cold air, i just charged it - Answered by a verified Auto Mechanic. With the ac off, you'll see the front part of the compressor (clutch) not moving. To determine if the clutch is operational or not, try these techniques: Here are some of the possible reasons why the clutch does not engage the compressor: To verify whether the fuse is not busted, turn off the engine of the car and disconnect it from the system. Start the car and let it run to ensure the compressor clutch disengages. Disconnected the switch connector to see if it affected the clutch, which it did not. So it could be it seems the ECC or the ECM. Sponsored By: Jan 3, 2021 at 10:43 PM #21. It started by not cooling under 1.5k rpm but would cool in gear driving above. Replacing The AC Compressor Clutch. play with the plug aswell Forums. As for where to look. Now look at the pulley of the air conditioner compressor. Lately I have noticed that the A/C compressor will not shut off when I set the control to "Vent" or "Off" The compressor clutch is pretty much turning 24/7 when the car is on. When Should You Replace Power Steering Fluid? Jan 2, 2001 15,902 4 81. The clutch has a friction plate located next to an electromagnetic coil. Does it still stay engaged? Higher Temperatures Than Normal In The Cabin. But first, know some facts about an AC clutch compressor. Topic Viewing 3 replies - 1 through 3 (of 3 total) Author. A/C compressors are difficult to work with because of the refrigerant stored inside. It's got new soft lines, new low pressure switch, new evaporator, new receiver drier, and a rebuilt compressor. Two types of high-pressure cutout switches. The AC compressor clutch is the first thing that moves every time you turn on your AC. It is an ominous sign when the clutch engages but the compressor does not spin. Clutch will not disengage. Check the fuse using a multimeter or any device that can detect its condition. Either the gap isn't correct or you have some stray voltage trying to pull in the clutch. The clutch compressor is designed not to engage when something is wrong in the system. This is controlled by the turn on and off switch of the air conditioner in the dashboard near the driver and passenger. Ford Mechanic: Ron, ASE Certified Technician replied 10 years ago. BUT, the ac relay is the off/on for the power. Removing the ac clutch fuse did not disengage it. Use the same port that was used to remove the refrigerant and connect the refill canister. Sometimes I think all Subarus are Outbacks. These come complete, including instructions. It may not be difficult to diagnose a clutch compressor’s “malfunctioning”. Find Causes and Solutions​​​. To utilize the AC on your car on demand, the clutch compressor is activated. Plus, the clutch release bearing will constantly have pressure on it along with rotational twists causing excessive heat build up. Social. You can check the AC’s manual for the right operating pressure on this side. care-my-cars-how-to-use-an-OBD-II Scan Tool, When Should You Replace Power Steering Fluid. With the AC on, you should see that clutch moving. It would not disengage. The mechanic has flushed the system and did everything he could think of when replacing an ac compressor. The clutch not disengaging wouldn't be effected by anything other than the air gap. I could not change gears so luckily I pulled into a gas station and turned off the car, When I restarted the car the clutch was ok and after work on my way home it seemed ok. Is the clutch going bad? I installed r134 while running the ac. This article will help you decide on what to do when the AC compressor clutch is not engaging. ac compressor clutch; Page 3 of 3 < Prev 1 2 3. Creator. The only way I get it to turn off is when I turn the fan off or press the A/C button. ... It’s possible that the clutch got too hot or something and is actually sticking together so the clutch never actually disengages. Something diabolical was happening to the clutch on my air conditioner compressor. I am worried this will damage my compressor and lines will freeze over. From all indication you may have a bad control head. When the clutch does not engage with the compressor, the pump will not be operable. Most cars currently use an electromagnetic AC clutch system to make the process of engaging and disengaging the AC compressor automatic. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. An AC clutch compressor is a type of compressor that derives its power from the car engine’s flywheel. The center part (the clutch) should be engaged and should be spining along with the pulley. To disengage the clutch, a switch must be replaced. A/C compressors are difficult to work with because of the refrigerant stored inside. January 22, 2019. It seemed possessed! Answer. Air conditioners operate as a closed system. I was mistaken, it is a Forester, not an Outback. It is screwed into the refrigerant canister and has two wires extending from it toward the wiring harness. If the pulley is the only one spinning, the clutch is inoperative. Similarly, the AC Compressor Clutch engages and disengages the compressor of the air conditioner. Which makes sense and not the ECM controlling the compressor clutch. This switch is located on the metal canister next to the compressor. I removed the fuse controling the A/C, the clutch still remained engaged. The clutch compressor is an integral part of the AC system of your car, rendering this inoperable is a big inconvenience for the car’s passengers. Essentially it is like it is working on a 50% duty cycle, starting and stopping every a few seconds. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. as soon as you charged system full was good to go. Do so until you reach the appropriate pressure level. Easy test, unplug the clutch. That is why it disconnects when you remove the wires from the low pressure switch. Changing the compressor clutch could be the only solution in this case. It is an ominous sign when the clutch engages but the compressor does not spin. In this case it usually means you have a low pressure cycling switch failing. Checked voltage at the compressor, shows 12 VDC. Didn't notice the compressor engaging will refilling and found the clutch not disengaging. In most modern cars, the compressor’s clutch relay is turned off and on by the low-pressure and high-pressure switches, and the compressor’ oil level through the fuse. Does it still stay engaged? Previous Next KK Lifer. Ron, ASE Certified Technician. From the looks of it, the climate control head is commanding the compressor on all the time. The clutch not disengaging wouldn't be effected by anything other than the air gap. Most cars currently use an electromagnetic AC clutch system to make the process of engaging and disengaging the AC compressor automatic. Look on the compressor for an electrical connector, and if you can, unplug it. You can check your car’s AC manual for the correct pressure level. Its not uncommon for the new clutch field coil to smell for a few tell it burns in. Because the switch is a connection between the canister and the condenser, the refrigerant must be drained from the canister. The ECC controls the engaging of the compressor clutch. I noticed my A/C compressor stays engaged when I turn the A/C on. If not, can the A/C clutch be replaced without removing the compressor. I have a 2003 Ford Crown Victoria. If no test the clutch feed for voltage. The clutch on the ac compressor will turn and spark fire along with fumes of burning oil. This still did not allow the compressor clutch to cycle. And what turns the ac relay off/on. Too many variables for online diagnosis - recommend seeking *hands-on* assistance from qualified personnel. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. A Denver native, LeDoux has written for over 10 years for various blogs, creative writing sites and school newspapers. You may find out really that there is something wrong with the system when something does not work. Yes, it disengages when the AC is turned off, but while the AC is on, the clutch will not disengage. If the compressor is overcharged with refrigerant, the high-pressure side will register an abnormally high pressure reading. The clutch is located in front of the AC compressor. The clutch keeps the compressor activated, if it breaks, the compressor will not be able to receive the engine power anymore. At the mechanic, the repairman will check the serious level of the compressor clutch, then they may … Theoretically, if an air conditioning system is low enough on refrigerant to disengage the compressor clutch, it’s too low to be recharged with a DIY kit. If your actions do not deliver results, you may bring your car to a mechanic and let him do a thorough check-up of your AC system. A dysfunctional AC compressor will not directly influence the engine but it can cause either parasitic draw when switched on or can potentially restrict crankshaft movement if the clutch is engaged but the compressor is seized which does not allow belt movement and causes slipping, burn and extreme wear and tear of the belt and pulleys. It appears to turn freely and it isnt hung onto the clutch, as it should be..I installed it and before putting any r134 in it I started the car with the ac off the clutch engaged? Once the canister is drained, unscrew the switch from the canister with a wrench. Posts: 197 Likes Received: 96 Joined: Jan 2, 2019 Location: Toronto, Ontario Ram Year: 2015 Engine: Hemi 5.7. Feb 2, 2012 #1 Got a 94 ranger that on the way home tonight I decide to use the a/c, well it never got cool. Hi Eric, I have a 2004 Honda accord 4 cylinder 2.4l sedan. You could check the oil’s specifications on the owner’s manual. Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley. The units … We offer full-service AC system repairs, from replacing worn parts to system recharges. That should stop the battery drain. But the wire is just ECM to PDC, then PDC to AC compressor. The clutch on the ac compressor continues to go bad. Why should you not drive on a flat tire? Can anyone help me, I purchased a A/C from AMA for my Suzuki sidekick 1600 EfI with power steering Part No 14404-4284 I am very pleased with the system it … Sounds like either the a/c relay is bad or a/c compressor clutch is not disengaging. One of the first signs which is really to recognize … ​If you experience your car’s air conditioning (AC) clutch compressor pushrod on . You've got a short somewhere supplying power to that wire. When this is activated, a current passes through the coil creating a very powerful electromagnetic force (EMF). Show Less. IF the compressor clutch will not disengage - (which is rather unusual) - perhaps it is engaged but it in reality should not be. AC System Repairs Your vehicle’s AC system is far more complex than you might think, and it relies on a plethora of parts and components to operate properly. 1985 AC Compressor does not disengage. Initially the compressor engages normally and AC works as it should. Probably not much changed from '85 to '90. Investigation shows low side pressure high (No high side gauges) and when the car is on, the ac pulley is spinning. On the contrary, the AC continued to work properly. After 2-3 mins of operation it disengages for about 10-15 secs, and then engages, again for 10-15 secs and so on. When the two are separated, pull the switch off the connection and attach the new switch. Does anyone know what could be causing this malfunction? The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. The clutch disc is splined to the compressor shaft. if it engages and disengages it can be the clutch itself has gone bad, the ac clutch will also disengage if there is not enough freon in the ac system, will also engage and disengage if the pressure gets too high in the ac system. If you turn the knob to A/C and the clutch doesn't engage and start spinning the compressor, tap on the clutch itself lightly with a screwdriver handle while the rig is running and the knob is on A/C and see if the clutch locks up. The AC compressor clutch is the first thing that moves every time you turn on your AC. Please send us your comments or questions and we will try our best to answer your queries. cabin ac button has no effect meaning it doesn't load the engine. I would try swapping out the dash ECC first before digging into the ECM. Customer Question. Ac pulley clutch not disengaging. Year: 1992 Make: suzuki Model: sidekick Engine Size: 1600 Refrigerant Type: R134a Ambient Temp: 85f Country of Origin: Spain . Now it won't work at all. Show More. Either your ac relay is stuck on. Popular Answer . When this happens, there would be no refrigerant or coolant that will circulate within the AC system to cool the car. Think of it as a switch that is responsible for engaging and disengaging the AC compressor pulley from its compressor drive. My question is, is there anything else that can cause the a/c clutch to remain on. Think of it as a switch that is responsible for engaging and disengaging the AC compressor pulley from its compressor drive. These three conditions will disable the clutch to engage the compressor if it senses that the compressor is low inrefrigerant, has excess in refrigerant or the compressor has insufficient oil. If it stays above this number the clutch won't disengage. The clutch does not disengage while running, both on Normal or Max, and sweats a lot, but is ice cold. When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. If you have a scan tool … I will try to check the pressure transducer tomorrow. I will be scraping the car in the next year and do not wish to have it fixed so is there a way to turn off … Air conditioners have sensors that determine the pressure and temperature of the refrigerant, starting and stopping the compressor by engaging or disengaging the clutch. 1 answer & 1 comment. The unit will work for about a week and then go bad. Easy test, unplug the clutch. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. Once I got home I noticed the clutch wasn't engaging at all. Save … Similarly, the AC Compressor Clutch engages and disengages the compressor of the air conditioner. With the connector off of the compressor, the clutch still does not disengage. The compressor is lubricated by refrigerant oil. I looked down at the clutch on the compressor, and noticed it was engaged. The compressor is typically engine driven via the accessory belt, and the clutch on the compressor is used to engage and disengage the compressor. Advertisements dennisgli. It started by not cooling under 1.5k rpm but would cool in gear driving above. Copyright 2021 Leaf Group Ltd. / Leaf Group Media. To disengage the clutch, a switch must be replaced. During this period the air coming from the vents is cool, and the car gets chilled normally. Re: AC clutch not disengaging « Reply #7 on: Aug 13, 2010, 11:59:33 am » If you have an air compressor, you can blow the excess oil out of the evap but you have to … As the vehicle ages, the system sometimes develops a leak. A delay can cause serious damage to the air conditioning … To disengage the clutch, a switch must be replaced. Sign in to reply. For more of his work, please visit http://adistortedperception.blogspot.com. GordDavey Senior Member. Ac slowly has been acting up over the last 6 months. The clutch and compressor are two of the most important parts and the hardest working elements of your car’s air conditioning system. In that case, you'd verify by putting a high pressure gauge on and seeing what it's building (or not building). Share this conversation. What to do When AC Compressor Clutch Is Not Engaging. So, next time, better check these things occasionally to avoid problems: Find more other questions to understand more your car here. We use cookies to give you the best possible experience on our website. Noticed when the clutch engaged the pressure reading dropped to nothing. It would not disengage. A bad AC compressor clutch needs immediate fixing. I could not change gears so luckily I pulled into a gas station and turned off the car, When I restarted the car the clutch was ok and after work on my way home it … To run this compressor, the car’s engine is directly connected to the pump rotor of the compressor with a belt. The clutch can be replaced without having to buy a new compressor. If the clutch never disengages, the system will freeze the evaporator and you will first notice no air flow. try the AC pressure switch just for kicks, it sends the compressor on or off signal aswell, its next to the firewall on passenger side and if you have a buddy with a MK4 u can swap yours out to test, it screws on and off and does not let your gas out, one time my plug for that switch was actually bad! But there are only a few pieces to the entire AC system. Now it won't work at all. If you open the hood, the ac compressor is the furthest right thing that has a belt going to it. what's going on? Anyone have any idea?? Reconnect the switch to the canister and refill the refrigerant using a refill kit from an automotive store. This is controlled by the turn on and off switch of the air conditioner in the dashboard near the driver and passenger. You can try … AC compressor clutch not engaging Posted ... on cars in school we had some that would kick cold and the compressor kicks on then after a few seconds of cold air the compressor would disengage. It seemed possessed! Answered in 3 minutes by: 4/10/2010. I don't know what conditions cause the condenser fan to run or not. The three components of a car’s air conditioning compressor clutch When power energizes the clutch coil, the magnetic field pulls the clutch in towards the pulley. This can also help in diagnosis. Add the type of oil compatible with the compressor. The AC compressor continued to turn even after I pulled the 12-volt supply wire to the unit. 2005 ford focus zx5. Still waiting for his neighbor to get home to borrow the … The center part on the pulley of the A/C compressor will not spin when you have the air conditioner off or if there is a problem. Automotive air conditioning system uses an electromagnetic clutch mechanism that engages the compressor to turn the AC unit. 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 ac compressor system has been replaced three times. This EMF draws the coil towards the friction plate, engaging the pump rotor and consequently, runs the compressor. View Profile View Forum Posts Private Message View Blog Entries Member Join Date May 17th, 2003 … What would make the pressure drop when the clutch engages? A delay can cause serious damage to the air conditioning system and the engine. 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. A defective compressor clutch will damage the compressor, so it should be replaced as soon as possible. (adsbygoogle = window.adsbygoogle || []).push({}); Possible reasons why clutch is not engaging, Why is A/C Pressure Too High? Such oil is also available on Amazon, like the Cool Bear A/C Compressor Oil or the ACDelco 15-118 Compressor Oil. That makes operating the air conditioning system in your car more user-friendly and convenient. I checked the control knobs and they were in the off position. It sends a signal to the ECM to turn on and when you turn off the A/C, the signal is still being sent. Thread starter KK; Start date Feb 2, 2012; Sidebar Sidebar. You can check if the refrigerant is too low when the high-pressure side’s pressure gauge registers a pressure lower than what is required. When a compressor clutch does not disengage, it will cause the refrigerant to build up and freeze the line. Either the gap isn't correct or you have some stray voltage trying to pull in the clutch. Checked voltage at the compressor, shows 12 VDC. But, sure you can’t use your car’s air conditioning system when this happens. Car makers use an electro-magnetic clutch to engage and disengage the air conditioning compressor. Status Not open for further replies. You will see that teh ac compressor clutch is always hot. If yes you need to adjust the air gap. johnsharpley on Tue August 26, 2008 12:47 PM . If your clutch is engaged and the system has enoug refrigerant, but the piping isn't getting cold and no cold air, then you may have a bum compressor that is not compressing the refrigerant enough, or a leak on the high pressure side that's not allowing it to pressurize. The Garage . The clutch either transmits power or not, and it does not work partially. The compressor clutch tries to engage/does not fully disengage causing a loud noise when I do not have the AC turned on but the AC works perfectly otherwise. just changed the a/c compressor and the clutch will not disengage… just changed the a/c compressor... just changed the a/c compressor and the clutch will not disengage. Now the clutch is engaging, pressure is dropping, and clutch is disengaging, the pressure comes back up, and repeat. Turned off the A/C and still have 12V at the compressor. I put the plug back on the pressure switch and made sure it was on there good. This makes operating your car’s air conditioning more convenient and user-friendly. Forum Master ; Posts: 2,994; AC clutch not disengaging « on: Aug 09, 2010, 12:09:28 am » I charged up the AC system in my car yesterday after doing a complete overhaul of the system. That makes operating the air conditioning system in your car more user-friendly and convenient.

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