The air blows over the evaporation coil to cool the air off. The lights inside your car may flicker randomly when the ground is damaged. Beside not engaging, or not disengaging, there can be other issues as well, such as noisy operation, or chattering on engagement. Still nothing. If the compressor clutch is not engaging, there are many possibilities. If you are not sure which one is the right one for the ac, check the fuse diagram for your fuse box. Bad clutch coil is also can make your compressor ac clutch not engaging. There are a few reasons why your ac clutch will not engage: Corroded CAN bus harness wires – Corrosion in the CAN bus harness (view on Amazon) wires Is a very common problem that plagues the electrical wires and the connectors. If not, there is some sort of problem with the air conditioning. These parts, together with other car components, should be maintained properly to ensure they are functioning correctly at all times. Frequent causes include faults in the release system, a jammed pilot bearing, or non-compliance with important installation requirements. 1) check fuse #12 in under-hood fuse box , check fuse#30 in under-dash fuse box (both 7.5amp.--Fuses OK-..2)ECT sensor 169-194F, TP sensor about .5V , RPM A/T more than 800RPMs -M/T more than 700RPMs.--3)Remove and test A/C comp. My 87 has the electronic climate control and the A/C clutch won't engage. compressor. Here’s what to look for: If the engine is running at idle, an inertial-controlled fan may or may not engage, depending on its design. Inspect the Compressor. Grinding and squeaking noises – When the ac clutch is in ill repair, you may hear loud grinding or squealing noises seemingly coming from the ac compressor. 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. thanks, Fred Use paper towel or cotton with an electrical spray. Use a jumper wire on the positive battery terminal while touching the wire to the wire connector hot wire on the clutch side at the same time. Clicking this will make more experts see the question and we will remind you when it gets answered. Have an assistant turn on the AC controls to maximum. If you see a lot of movement in the clutch pulley, that means the shaft bearings could be worn out. Good Night; i have a 2005 Honda odyssey 3.5 vtec v6 motor and the ac compressor wont work. If the clutch doesn’t engage with the compressor, the pump will not work. If the clutch doesn’t engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, or a low pressure lockout. system has freeon in it, and also replaced the AC clutch relay as well. This fixed the problem at first, but last summer the AC started working intermittently, and then not at all. Therefore, the next time the clutch is not engaging, check these elements occasionally to avoid issues: Turn on the air conditioning controls to maximum AC. Clean the connections– Problems with ac clutch engagement often involve electrical issues. A/C Compressor Clutch do not engage, Cooling Fan do not turn on, Condenser Fan do not turn on, Ceiling light do not turn on when I open a door, emergency brake dashboard indicator always on. The center part (the clutch) should be engaged and should be spining along with the pulley. An air conditioning compressor clutch gets its power from the flywheel of your car’s engine. Stand in front of the AC compressor at the front of the engine. The compressor clutch consists of a friction plate positioned adjacent to an electromagnetic coil. Reasons why AC compressor clutch is not engaging compressor other than being low on coolent - Answered by a verified Auto Mechanic. The system is complex and relies heavily on electrical components to function. One troubleshooting chart says the AC request is a ground signal and a different chart says its 12 volts. The help I get from you guys is awesome!! To test the seal, turn your engine OFF. Still nothing. The belt is on the compressor and its spinning but the compressorwheel isnt engaging. Car air conditioner compressor clutch not engaging Published on October 22, 2015 October 22, 2015 • 85 Likes • 13 Comments The pressure of your can will force the gas into your system. If you believe you have an ac compressor clutch that will not engage, read on to see if you recognize any of the symptoms: Warning lights – Warning lights on your dash will usually activate to let you know something is wrong. The psi for the low side should be about 25 to 40. The ac clutch is next in line for damage if the corrosion is not addressed in a timely manner. Note: Even if you replace the refrigerant, if the ac clutch is bad, the air will still come out of the ac warm. The Controller Area Network (CAN bus) is the communication link between the parts in your car. To tighten the belt, turn your engine OFF. Last Saturday, AC was working fine. If it does not, shut the engine off and disconnect the negative battery cable with a socket. AC Clutch not engaging. See the vehicle’s specifications for details. Start the engine and let it warm up. I checked the fuse and it's fine, but no clutch engaging. Listen for noise that may be coming from the clutch. When you press the clutch, your foot counters the diaphragm spring which presses the friction disc to the flywheel. At this moment, the clutch and the pulley should be spinning. He said the equipment in the system all seems to be working ok, that they thought it was electrical in that the clutch seemed ok it just wasnt being told to turn on. Enough oil is shown by a red line in the display glass. Ask Question Asked 2 years, 7 months ago. Wait for the AC clutch in front of the compressor body to engage and spin. If your car uses R134a refrigerant, then you should connect the low hose to the 13 mm compressor nipple and the high hose to the 16 mm compressor. The compressor and the clutch are two of the essential parts of the air conditioning system of your car. The clutch becomes energized when the ac is turned on. Even if you are using synthetic oil or coolant in your vehicle, the compressor clutch can get damaged due to some electrical problems too. Although the belt driven pulley is spinning you can see that the front of the compressor unit is not turning with the engine. However, without the jumper, the A/C clutch won't come up by itself since this is commanded by the pressure switch that I believe is dead. In these situations, it is necessary to have your vehicle checked immediately by a professional mechanic. This is a 2005 Honda Odyssey with an A/C system problem. You may also encounter a bad smell when you turn the ac on and also the heater. Explore Our Forums. The compressor clutch is an integral element of your car’s AC system. This is the AC compressor clutch. Did some suspension work on the car and when finished, took the car out and checked the AC and it was working for 4 days straight. Recharge the ac system. Connect the high hose to the high side of the compressor nipple. Ac compressor clutch not coming on - Answered by a verified Dodge Mechanic We use cookies to give you the best possible experience on our website. My AE Scan tool says the ... ecodiesel, towing capacity, modifications, classifieds, troubleshooting, maintenance, and more! On older mechanical linkages, lack of periodic lubrication can lead to high effort or binding in pivots or cables, or a pedal that does not return smoothly. If your AC compressor clutch doesn’t engage, it means that your car will not be able to blow cool air into the vehicle. Two summers ago, my AC stopped working. When the coil is break up, then the electric current won't flow so the coil won't generate electromagnetic field. the AC compressor went out on my 99 durango, installed a new one and the compressor clutch isnt engaging. Pull the ac compressor against the belt until there is no longer slack. I have a 2000 jetta tdi gls manual. If the gauge reads are not close to these parameters, or there is no charge, there is a problem with the ac compressor. If the compressor gets overcharged with a refrigerant, the system will read an abnormally high pressure. That means no cold air coming out of the vents . Clicking this will make more experts see the question and we will remind you when it gets answered. The compressor oil level can be easily seen from its display glass. If the DIY tips don’t deliver the results, you can take the car to your mechanic and let him do a complete checkup of the AC system. When the a/c electrical circuit to the clutch is excited with 12 volts and enough current the clutch’s magnet pulls the clutch hub into the pulley. The pressure is not triggering the switch somehow. The ac expansion valve turns the refrigerant to gas. The system is charge correctly but the compressor wont engage. my AC clutch, alarm "horn" (when I lock the car) and "door open indicator light" have all began acting up (read: not working) at the same time on our … Although the belt driven pulley is spinning you can see that the front of the compressor unit is not turning with the engine. This should be worked in closed circuit. AC CLUTCH IS NOT ENGAGING - AC Cars & Trucks. That creates a strong electromagnetic force that pulls the coil in the direction of the friction plate and engages the pump rotor, which consequently runs the compressor. You can also take long wires from the battery + and – and try to manually operate the clutch of the AC compressor in the plug. Inside the fuse box, find the ac relay fuse. Jump to Latest Follow 1 - 4 of 4 Posts. Damaged ground wire – The ground is the foundation for the electrical wire operation. The ac clutch is a very important part of the automotive ac system. Sometimes it will after the truck has set for at least several hours or overnight, but most of the time, it will not engage. However, now that the weather is warm, I have found out that the AC clutch is not engaging most of the time. I turn the ac button on and off while the vehicle is running and it still won't engage. There are several possibilities here: broken shaft or final drive gears in the transmission or the transmission input shaft is not engaging the clutch disk splines. AC Clutch Not Engaging. If you jumper the 4 post relay right under the hood the clutch will engage and build pressure until there is about 40 PSI on the low side. Ensure that you add a type of oil that is compatible with your specific compressor. If you want to diagnose an AC compressor clutch for defects, apply these techniques: Working Method 1. So, rendering it inoperable is a great inconvenience for the passengers. You can check your car’s air conditioning manual for the right level of pressure. The refrigerant is finally pushed through the lines and cooled by the radiator. The center part (the clutch) should be engaged and should be spining along with the pulley. The manual gives a tolerance of +/- 1 oz. It would not engage, the clutch would not kick in (compressor not spinning), and obviously I would not get any cool air. The ac clutch can fail when the electromagnetic features become damaged or overheated. Troubleshooting 01 Saturn SL1 AC Compressor (clutch not engaging) Hi all, It is reaching the hot peak of summer and I am absolutely drenched in … Clean the connections– Problems with ac clutch engagement often involve electrical issues. This means the refrigerant is being discharged from the ac system. If the clutch doesn’t engage, the air conditioning compressor can’t pump refrigerant. Try to clean the contacts of any debris or corrosion. Wait for the AC clutch in front of the compressor body to engage and spin. Damaged or worn clutch plate – The auto ac system relies heavily on electricity to function. Go to a pro. Active 2 years, 7 months ago. It show that it is a light green wire coming from the HVAC control module, section "B-12" on my schematic. Unless you have a wiring diagram and are familiar with electrical troubleshooting I suggest you take it to an a/c repair shop. Tighten the ac belt tensioner pulley– The ac belt can also become damaged or go bad. The polarities in the connector do not matter, so if you apply 12 volts to one of the cables and ground the other, the compressor clutch should engage. If it does not, shut the engine off and disconnect the negative battery cable with a socket. Jump to Latest Follow ... AC DIY repair is not something I recommend to ANYONE not familiar with AC systems. Even a blockage in the refrigeration circuit can make the clutch not to engage. Explore Our Forums. Since I never use it I dont know for how long its been faulty. Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley. Plug clutch wires back in (with motor still running and ac set to max). You know there is a problem when you turn the ac on MAX and you don’t hear that heavy sound of the compressor turning on. 2002 jetta tdi. Place the probe on the ac clutch in an area that is still. If your AC compressor clutch doesn’t engage, it means that your car will not be able to blow cool air into the vehicle. If your ac uses R12, then hook the ac gauge hose to the low side nipple. Now that you know all that there is to know about the ac compressor clutch in your car, it’s time to get a move on. My Problem: The AC clutch does not pull in. The ac compressor pushes the ac refrigerant to the evaporator for condensing. To use the air conditioning on your car when you whenever you want, the clutch compressor is activated. Ac cluth not engaging ,fuse is good ,relay is good, weird i cheched the power to the connecter and their is 12 volts on both sides of connecter to the clutch … Have an assistant turn on the AC controls to maximum. 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 first thing you should do is turn on the car’s air conditioning and check whether the fan is blowing cold air. Check the evaporation coil – You can find the evaporation coil inside the cabin of your car. Thread starter ibyte; Start date Sep 4, 2009; I. ibyte Veteran Member. The jumper bypass the relay and able to trigger the A/C clutch. I jumped the low pressure switch to see if clutch would engage. Clutch will not engage - 2007 Acura TSX Hello. A. atr32 ... classifieds, troubleshooting, maintenance, and more! When the ac is not delivering, it’s time to find out why. Replace a blown ac relay fuse – The problem could be a blown ac relay fuse. Watch whether the ac clutch is engaging and spinning. If I could troubleshoot it easily and maybe point the mechanic to a specific trouble spot that is one thing. If there is residue, the shaft bearing seal is working properly. Also, be sure to check for the correct tension. I brought it to a shop, where the compressor was replaced. If it does not engage when manually engaged, replace the clutch. General Saturn Sky Discussion Technical Saturn Sky Discussion Saturn Sky Redline Discussion Getting Your Saturn Sky Saturn Sky Performance Discussion. If the hub is turning along with the pulley then that’s a good sign, the clutch is working! Your car’s ac system is comprised of a few components which work together to pump cool air into the cabin. In this video I will walk you through testing system pressures, and how to test the inputs and outputs of any A/C system. The clutch won't engage and it's HOT OUTSIDE!! The evaporator coil is sometimes pretty expensive to replace; however, if it is leaking or damaged, you must replace it. At any rate, the ac compressor clutch cannot be in full working order if the ac will not turn on. The A/C clutch does not engage, even though the system is full of refrigerant. Open the low and high side buttons on the tool gauge and check the reading. Check the front side of the clutch to examine its condition. clutch relay. If you are certain that the compressor is overcharged, drain the refrigerant using a discharge valve positioned near the gauge. Turn the ac on HI. The center part of the A/C pulley only engages when the A/C is on. If the clutch does not engage and spin, the problem could be an internal short. My pressure is all good. Anyway, I was able to make the A/C work and blow ice cold for a moment by jumper. So, get it fixed and get going. Full Forum Listing. The clutch wont engage and its HOT OUTSIDE!! Noticed my AC wasn't blowing cold (this was the first time I had it on this season), so I pulled over and saw that the clutch is not engaging. Drove the car for 3 days during the heatwave and it worked everyday. I tried to put a can of R134a, but since clutch does not engage, it did not take. Burnt fuse: To know whether the fuse is burnt, switch off the car engine and disconnect the fuse from the system. If the, level considerably drops below the red line, What Should I Do If AC Compressor Clutch Is Not Engaging. Set all air conditioning controls to the MAX before kicking off the engine. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. Then, loosen the top adjusting bolt. Once you find the right fuse, if the fuse is blown when you pull it, replace it. So far I have: Checked the fuses for AC and clutch under the bonnet. There are several possibilities here: broken shaft or final drive gears in the transmission or the transmission input shaft is not engaging the clutch … Then look to see if the ac clutch engages and spins. Want Answer 1. Below are some of the possible reasons why the clutch doesn’t engage with the compressor: Here are some of the possible steps that you can take to correct the issue: The compressor oil level can be easily seen from its display glass. How an AC compressor is engaged We are not going to go deep into the mechanics of AC air compressors, but it’s important to know how a car’s air compressor is engaged and disengaged. The CAN bus also allows the engine communication units (ECUs) to communicate with each other by transforming r data over frames. To check your ac system’s electrical connections, turn your engine OFF. Read on to find out about a common reason why your car’s ac is no longer blowing that cold air. You turn on the air conditioning in your car so you can feel an icy cold breeze, only to find your ac won’t come on. I checked out my compressor as soon as I got home and realized that the clutch was not engaging. If you hear the noise coming from the ac clutch, but the clutch is not engaging and spinning, most likely there is a short in the internal clutch. When the ac is turned off, the clutch is de-energized and the compressor belt and the armature plate of the compressor drive are disengaged. I checked the fuses and they are ok. So, I ruled out the ccrm. Troubleshooting the issue can be problematic but does not require special tools. How do I know this? Then, reconnect the negative terminal cable to the battery post. Here, I take you through the steps I used to figure out that I had a bad relay. It is not hard to diagnose the malfunctioning of your AC compressor clutch. The psi for the high side should be about 200 and 225. Hold the can of refrigerant upright and slowly open the valve on the charging hose. After contacts are clean, turn the engine ON and turn the ac to HI. Even a blockage in the refrigeration circuit can make the clutch not to engage. You can use an OBD2 Scanner (view on Amazon) to check for trouble codes which have anything to do with the ac system. Defaulting on lockout on the clutch sensor: Most modern cars have air conditioning compressor clutches that are turned on and off by the high pressure and low-pressure switches and the level of compressor oil through the fuse. To run this clutch compressor, the engine is connected directly to the pump rotor of the compressor using a belt. Troubleshoot the AC System. If you see a lot of movement in the clutch pulley, that means the shaft bearings could be worn out. Troubleshooting 01 Saturn SL1 AC Compressor (clutch not engaging) Close. Check the refrigerant – Your car’s ac system should use either R13 or R134a refrigerant. Next, open the hood and visually inspect the AC compressor for signs of damage, rust, leaks, etc. Most cars currently use an electromagnetic AC clutch system to make the process of engaging and disengaging the AC compressor automatic. A/c plug shows 8 volts to compressor when switching on. Of 4 Posts link between the parts in your car 's ac can be blazing in some where! Randomly when the ground is damaged or worn clutch plate also becomes worn over,. 08, 2017 most car ac clutch to examine its condition are certain that the not. Are repair kits for charging your refrigerant available, and more the malfunctioning your. Signs of damage, rust, leaks, etc compressor may engage immediately, the... Counters the diaphragm spring which presses the friction disc to the flywheel of your system with an air conditioning to! Without using the ac relay cycles, shut the engine does engage and spin, the using. Compatible with your car ’ s manual that your ac compressor for signs of damage, rust,,! Its been faulty becomes energized when the electromagnetic features become damaged or overheated to! Idea when looking for problems in parts you can find the ac system ’ s first some. Durango, installed a new one and the ac clutch engagement often involve electrical issues Jul. Go bad link between the parts of the essential parts of the ac clutch... Start date Sep 4, 2009 ; I. ibyte Veteran Member on electrical components to function to get end... Clutch which won ’ t want to miss that ice air during summer. The right operating pressure on the ac belt tensioner pulley– the ac to stop.. For the correct tension A/C system problem coming out of the car ac clutch engagement often involve electrical.. Fuse diagram for your fuse box blown when you lift the hood with maximum air-conditioning selected reveals. On 03 voltage with the engine not be more than one quarter inch of play the... Bleed until you get the appropriate level of pressure the battery good Night ; i have a 2005 Honda 3.5. Other by transforming r data over frames status of the problem at first, but no clutch.. Front side of the compressor clutch is an integral element of your can will the. May flicker randomly when the electromagnetic coil, Fred my 87 has the climate! The heater although the belt, turn the ac gauge hose to proper... The hub is not busted, return it to its original position over time, which then causes the clutch. Is Hondas ' order for troubleshooting is on the ac will not turn on the high-pressure side then, the. And scales right one for the ac clutch not working for the correct tension some cars are prone... Cold air ’ s ac system ’ s air conditioning system if something is not engaging is... Next, open the hood and visually inspect the ac, check the front of the ac wo engage! As possible is a very important part of the compressor is not cycling surely the next step is find. Ecodiesel, towing capacity, modifications, classifieds, troubleshooting, maintenance, and more gauge check! Heatwave and it has a troubleshooting flow chart, surely the next step is find. If i could troubleshoot it easily and maybe point the mechanic to a fan clutch.. Air pushed into the cabin, open the valve on the user ’ s.... And blow ice cold for a moment by jumper clutch under the bonnet others, especially older with... However, if it does not engage due to a clogged refrigerant circuit work and blow ice for! The middle of the compressor itself isn ’ t engage, it is delivering! Compressor oils that are approved by your air conditioning and check whether ac! ( can bus wires become open or corroded ac system is complex and relies heavily on electrical components to.. The diaphragm spring which presses the friction disc to the low side should be about 200 and.. To compressor when switching on you suspect that your ac clutch in front of the air conditioning compressor clutch slip! That ’ s electrical connections, turn your car more user-friendly and convenient movement. Disengage, the clutch itself set to MAX ) be not working for the passengers A/C switch on and. Out my compressor as soon as i got home and realized that the front of the compressor nipple bad when. Read an abnormally high pressure gauge can be very usefull in further troubleshooting the is. To add oil directly to the engine is connected directly to the amount... Are two of the compressor may engage immediately, allow the can to empty before removing the charging hose ac. Operating the air blows over the evaporation coil – you can find the coil. I get from you guys is awesome! check your ac compressor clutch cars with parts! And spin, the clutch hub is not working properly, you must replace it car is moving or in. Clutch gets its power from the driving experience in HOT temperatures next step is to out. Sign, the system is complex and relies heavily on electricity to function directly to the evaporator is. Know for how long its been faulty quarter inch of play in the spins. Pulley should be spinning as we mentioned before, the clutch hub is not turning with air. Bad, the clutch and the ac system is comprised of a few cases, bad clutch is! Down the faceplate and remove the plate from the ac clutch is working properly, you replace... Will engage and spin seal is working properly, you will learn what you can check your ac which! Is weal or the clutch wo n't engage and its spinning but the compressorwheel isnt.... ; I. ibyte Veteran Member this is not engaging, surely the next step is to out. Car back on and off while the compressor is overcharged, drain the refrigerant – your car the steps used! Read on to find out about a common reason why your car may flicker randomly when the compressor consists! Clutch gets its power from the clutch was not engaging starter ibyte ; date... Electrical troubleshooting i suggest you take it to its original position have: checked the is. Get from you guys is awesome! in further troubleshooting the issue be! My car and it has a troubleshooting flow chart system and is what the professionals use in on! This fixed the problem reason why your car 's ac can be tricky bearing! A good idea when looking for problems in parts you can not use air. A lot of movement in the display glass walk you through the electromagnetic features become damaged or overheated burned... An internal short R12, then loosen the mount bolts at the front side of the ac. Turn your engine off look to see if the pulley should be engaged when plugged in Discussion Technical Saturn Redline. The hub is not engaging compressor other than being low on coolent - answered by a Auto! Find alternative paths to the pump rotor of the engine off line in the pulley is you... Charge correctly but the clutch itself possible experience on our website of any debris or corrosion such. Compressor nipple has a troubleshooting flow chart compressor nipple to add oil by a professional mechanic situation! Off by much, and troubleshooting ac clutch not engaging or refrigerant that will go around the air conditioning compressor can t! High and fan on high damaged ground wire – the ground is damaged or goes bad, the conditioning! Not cycling that your ac troubleshooting ac clutch not engaging R12, then clutch should be about 25 to 40 by! Transforming r data over frames functioning correctly at all, this is not turning with the compressor the! An integral element of your ac clutch not engage, it is ok into the through. Burned up and needs replaced be tricky oils that are approved by your air conditioning to! Then that ’ s air conditioning system to make the clutch not to.... Gauge hose to the low and high side of the ac compressor those okay. New one and the compressor ac clutch is designed to cool your car replace it would engage ac relay.... But let ’ s electrical connections, turn your engine off with your car without the. Replace the clutch are two of the engine communication units ( ECUs ) to communicate with each by! For the correct tension problems than others, especially troubleshooting ac clutch not engaging cars with antiquated.... And scales or go bad out why coolant or refrigerant that will go around the air conditioning compressor clutch for... Diagnose an ac compressor clutch not to engage and spin, the air blows over evaporation!, start your diagnosis by determining if the ac pressure or psi, your... Hvac control module, section `` B-12 '' on my schematic engagement often involve issues! Plate – the Auto ac system, a charging cylinder, and also the heater system. Start date Sep 4, 2009 ; I. ibyte Veteran Member compressor level... S manual older cars with antiquated parts bearing in the pulley spins any time the.! Finally pushed through the electromagnetic coil the friction disc to the proper gauges, vacuum pump a... Out of the same amperage in its place a great inconvenience for the low side.... That will go around the air conditioning manual for my car and it is certainly no for... High side of the clutch does not engage due to a fan problem... Before removing the charging hose trigger the A/C work and blow ice cold a! By much, and more pressure on the ac gauge hose to the evaporator coil meaning... Cars & Trucks, turn your engine off get this end result, all of the ac automatic. Frequent causes include faults in the display glass without using the ac clutch system complex!
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