May you find this article as helpful as we hoped it to be. Cold air started blowing again! laumk7 FluffyBunnyFlipFlops Also, a ground connection to the AC clutch relays control coil side is provided by the PCM. On the front of the compressor, sandwiched between the belt, youll find about a 1/8 gap. 97 it's a, I have a 2007 h3 hummer base model. Refrigerant pressure is OK, but no cooling? Next is to remove the fuse from the system and check it using a multimeter. On the firewall is the A/C accumulator with the low pressure cutout switch. Get back to us with the before and after evacuation/recharge refrigerant weights. Measure the voltage coming to the connector with a multimeter, and if everything is activated properly, you should see 12 to 14 volts coming to this wire. Step three is not that complicated but it is delicate. If the clutch does engage manually, you are looking at some rarer issues. Unplug any relay terminal wiring with the interior car A/C controls in the "off" position. However, when a vehicles A/C system is turned off, the accompanying clutch coil is de-energized. Over time, you may notice your A/C not performing as it should. might look to manually run the AC pump directly at the clutch end. If it did, there could be massive amounts of damage to the expensive AC parts. This indicates some form of wiring problem. However, many components make up the air conditioning system, so your problem could be entirely different. Even with the key off, treat them like they can still come on. 2. See the FAQ in the AC section for the steps to adjust the clutch gap. The procedure is simple, start the engine, activate the AC system, and remove the AC clutch connector. Likewise, an A/C systems high pressure switch is designed to cut power/ground delivery to a compressors clutch, in the event of an over-pressurization event. Pasted as rich text. In some car models, you may also need ground. Here is to hoping its a 60 cent o-ring. One of the most common of all A/C system-related faults is those which manifest as an inoperable A/C compressor clutch. green and/or greasy components . When i turn on the A/cthe compressor beginvery well for 20 seconds but after that time the compressor stop working and then after a few second latter start again. Started February 26, 2015, By Also, its important that you replace the fuse with the appropriate amperage. Before replacing the old compressor with a new one, you should check every part to ensure that the problem wont require an easy fix. This pressure pushes the refrigerant through the rest of the system. . A/C only blows cold air below 78 degrees or so. Get it Jan 26 - Feb 2. Im Stephen and Ive been an auto mechanic for over a decade now. 2-3 weeks later, we saw the same puff and then no cold air. 4.5 amps, check clutch air gap. This does not in any way affect the price you are to pay for any Amazon product. Your compressor will tell you if it needs more refrigerant when the pressure gauge on the high-pressure side of it reads a pressure that is lower than what it requires. Started February 20, By Method 2: Jump-start The Clutch The process is a bit different for older cars that are not compatible with the R134a type. Free In-Store or Curbside Pick Up. Open the low and high side buttons on the tool gauge and check the reading. Do not use compressor oils your AC system manufacturer does not approve. TomsFocus Started Tuesday at 03:15 PM, By Perhaps someone can help get to bottom of this. PRICE: 84.99. If you have no power then it will not engage the compressor. Your cars AC system contains many electrical wires and connections. Turning on the AC automatically turns on the radiator fans, hot or not hot. Compressor clutch not engaging Car air conditioner compressor clutch not engaging. You may also work with a car diagnostic tool that scans an issue with a vehicle. I'm not kidding about this. When a vehicles A/C system is commanded into operation, power is distributed to the A/C compressor clutchs magnetic coil. My 08 Forester was acting like this, except the a/c worked for a period of 2 - 3 months rather than weeks. Mondeo Mk5, Fiesta TDCI 1.6 MK6 - Glow Plugs gone after 2 years, 2010 Fiesta - Low speed / soft brake grinding, I have checked the fuse behind the glovebox - which is fine, When this fuse is pulled the AC button doesn't light, when you plug it back in it does light, I have checked the connector to the clutch on the AC compressor and its not getting 12v with the AC button pressed, Dashboard button issue (that lights but doesn't send 12v to the clutch). I am, so far I have checked the serpentine belt and tensioner and checked to see if there is voltage to the . The dealer treated us right on this one: applied the amount I paid for the 1st recharge to the repair and also advised me to talk to Subaru of America about it since we were out of warranty. Started August 26, 2012, By Started 14 hours ago, By With this force, the coil is pulled toward the plate, which gives the pump rotor the power it needs to run the compressor. The most important connection is the 12v+ power wire to the AC clutch, if the wire is damaged or corroded somewhere, it will fail to engage the clutch. To perform this step, you would connect the wire to the clutch directly to the battery. Amazon Link AC Relays (Honda) - https://amzn.to/34vFNsrAmazon Link AC Relays (Toyota) - https://amzn.to/2NaBJbNIf your A/C compressor clutch won't engage bec. Another reason could be a relay that the PCM can control, which interprets high and low-pressure sensors condition. If nothin happens, ac clutch bad. Route the wires to the car battery. Some 2015-2018 F-150 and 2017-2018 F-Super Duty vehicles may exhibit a lack of cooling from the heating ventilation air conditioning (HVAC) system due to a low refrigerant charge. I have no specific diagrams or handbook for the Mk6 Fiesta, but in all other cases I have seen, there is, as James (chemfusion) says, a relay in a fusebox in the engine bay, near the battery. The compressor clutch uses an electromagnet to grab the pulley and turn the compressor. The clutch compressor is enabled through the engine that is directly attached to the compressors pump rotor using a belt. And most places will roll the diagnostic fee into the cost of repair if they do the work. You should check this area for bad noises and bad smells. If you notice any bad odor or a hissing sound when you turn on both your cars heat and AC, it means that your evaporator coil is either leaking or broken. This process engages the plate, along with the compressor belt. Inspect the harness to make sure that it doesnt have any opens or shorts. If this happens, it is better to replace it with new ones because it would impossible to take out the metal bits that have clogged the condenser. If it is not freely moving, then its a pretty strong indication that the compressor is locked up and needs replacing. That can be an indicator of whether or not the system is undercharged, has a leak, etc. RELATED: Car AC Not Blowing Cold Air? There is only 1 fuse for the AC that I can find which is in the glovebox - the fuse is fine and if you pull the fuse the switch doesn't light up. ), P2004 Code: IMRC Issue (Symptoms, Causes, and Fixes). It could also slip at times, leading to erratic operations. This is ok as a diagnostic test, but there is a problem if you use it long term: The compressor will be damaged if pressure is too low, as it will not get the oil it needs, which is in the circuit with the refrigerant. Just like any clutch, its possible that it has simply worn out. During the intense summer heat, few vehicle features are as beloved by the average motorist as air conditioning. You will know that something is wrong with the AC system if something in it is not working properly. It should be replaced if not functioning properly. Blower fan works but hot pig tails assuming it's on it way out. There are three reasons why the compressor clutch does not engage, especially if the sensor detects them. Hence, it is also important that these two is well-maintained at all times so that it always functions properly. This indicates some form of wiring problem. Inspect low coolant content or pressure. This helps the refrigerant to turn into a gas. Last summer, the A/C on our 2012 Ford Escape stopped blowing cold air. Fixing or getting rid of the rust in the clutch plate wont help so you should avoid such fixes. There are many reasons why an AC clutch does not engage. Check the front of the compressor clutch. Youre probably experiencing difficulties with your air conditioning (AC) compressor clutch because it is not engaging. That is RIDICULOUS, Cheryl. 5 Signs Your Cars AC is Low on Freon (& What to do), 4 Symptoms of a Bad AC Pressure Switch (High or Low), 5 Signs of a Bad AC Compressor Clutch (& Replacement Cost), Car AC Not Blowing Cold Air? Copyright 2023 Mechanic Base. With PAG 46. Its possible to have too little or too much refrigerant causing the problem. Jiffy Lube Vs. Valvoline Oil Change: Differences & Which Is Better. -or-. Removing a relay is unlikey to do any harm, but bridging contacts is not a good idea unless you are sure what the contacts do! Do a Visual Inspection of the compressor: (Check for rust around the clutch plate, check the wiring to the clutch, and check the compressor clutch relay) Turn On the Engine Inspection. Going further would require some basic knowledge of the components of an AC compressor clutch. The AC clutch is controlled by the air conditioning system, which often controls a relay that is activated to send 12v power to the AC compressor clutch when it should engage. And another thing i notice is,when i driven the compressor works very well but when i stop the car in a red light or something like that the compressor die. Any good shop should be able to trace this down. You cannot paste images directly. 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Dec 25, 2006. Alexdeltaron Notes: A/C install kit, Includes: Filter Drier, Expansion Valve, Compressor Oil, Necessary O-Rings and Gaskets, Cap and Valve Kit. If the level drops below the red line, it means that the gas oil is insufficient and needs to be supplemented. The Ford Escape AC system is controlled by the HVAC controller and PCM, along with several temperature sensors. Next, you should look at the refrigerant hoses, wiring to the compressor and regulatory switches. So they are saying there is no leak. If the switch is not operating correctly, the AC system will not be pressurized correctly and will not work as efficiently in cooling the air. Started 13 hours ago, By Goodmorning, the ac compressor on my ford escape is not engaging. What, if anything, could I try to diagnose? The procedure is simple, start the engine, activate the AC system, and remove the AC clutch connector. Martian. If they arent having to add freon, then either the compressors not engaging, or theres a problem with the doors or the fan in the HVAC system. Please check your cars AC manual to know its right level of pressure. Had transmission rebuilt (Pro).My problem is that when it gets around 35, 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Ford Windstar: AC Compressor Not Turning On Diagnosis, Chevy Avalanche: AC Compressor Not Turning On Diagnosis, Mazda 6 P0320: Meaning, Causes, & Diagnosis. I also talk about other relays that you ca. If you jump the low pressure switch with the engine running, do it only for a few seconds. Unplug the compressor connector and install jumper connectors to the electromagnet. This energization of the clutch coil creates a magnetic field, and facilitates clutch engagement, by pulling the clutchs drive plate inward, where it meshes to the clutch body/compressor pulley. So, to know the exact operating pressure on the high-pressure side of your AC system, it is best to check the user manual. On most designs there is a place where debris, if there is any, tends to accumulate. DizzyG We also examine what the AC clutch is and how you can fix it, so cold air will be in your future once again. Ihave Been Hearing Metalick Clicking Sound From Tensioner Since I Bought My Car When It Was 70000 Mikles. Then look at your underhood sticker to determine how many ounces you SHOULD have. Mark helpful 55,895 Tracy answered 8 years ago If the compressor clutch cycles on and off rapidly, then the system is most likely low. If the air conditioning isnt working, the problem could be the AC clutch. It could even be missing entirely without you noticing if it is an independent belt. That is why the pressure switch is there. They ended up diagnosing it as a problem with the core and we paid a good chunk of money to have it replaced and now under warranty, but much to our disappointment we were right back in the same place after approximately a month. But this is just a symptom. The AC compressor is getting a command to turn on but is no longer able to, which would indicate that it needs replacing. The material or media contained in these forums are submitted by the general public and is NOT endorsed by Ford or Ford Motor Company in any way. But, I have no reason to think it will last. Then focus on the compressor clutch. Something is telling it no to kick on. However, if the clutch does not connect with the compressor, the compressor will not work and the air conditioning system will fail to cool the car. Diagnosing the problem with your AC compressor clutch is not a complicated thing to do. Any ideas why its not lasting? Pennzoil vs. Mobil 1 Oil: Differences & Which Is Better? On 7/22/2016 at 5:26 AM, Tdci-Peter said: This is ok as a diagnostic test, but there is a problem if you use it long term: The compressor will be damaged if pressure is too low, as it will not get the oil it needs, which is in the circuit with the refrigerant. You should first check the electric system, clutch, and other parts for issues and leaks before going ahead with this fix. However, one must also determine the reason behind the fuses failure. 250 PSI / 50 PSI = The system is overcharged and the condenser is not cooling. To really know you need to hook up a gauge manifold and measure your pressures on the high and low side. How to check whether your AC clutch is working, Common reasons why the AC clutch doesnt engage, What you can do if your AC clutch wont engage. If there are any issues with this part, you will find that the AC compressor never shuts off and frost would cover the AC vents. July 21, 2016 in Ford Fiesta Club. If you notice that the belt is slipping then you would have to adjust it. Started February 6, 2020, By Automatic gearbox jammed in PARK, easy to permanently fix free, MK4 St-Line Estate 1.0 125bhp economy & performance, My 2013 Ford Fiesta 1.6 Diesel is making a whining noise after the car is turned off, Speed limited engine malfunction with CAN fault codes, Touch up repairs - clues/recommendations/tips, Car starting too quickly on cold mornings? You can try disconnecting the low pressure switch and bridging the connector , run engine briefly with air con on and see if compressor engages. The AC relay (number 20) reads good voltage to the relay outlet. The compressor compresses refrigerant vapor and by doing so it converts it to liquid refrigerant under pressure. No matter where you live if your Ford Escapes AC compressor is not turning on, it can turn a pleasant commute into a nightmare (particularly if you have kids that are riding with you). If this circuit is traced the fault of a open circuit can be found out. 37 % of the time it's the. If freon is low, it won't engage. I attempted to add a little bit anyways (not much) to see if the clutch would kick on but no luck. Fill it up until the pressure indicator on the refill . (Or Is It Just a Convenience? JordyC123 They repeated the same evacuation/recharge process again and the A/C started working again. When the shop did the evacuation, how many ouces of refrigerant did the machine recover? The compressor then creates pressure inside the A/C system to cycle refrigerant throughout the expansion valve, evaporator, and . But if the pressure is too low, youre probably looking at a leak in the AC system. I thought it might be low on freon, but when I went to check the low pressure, I got a low pressure reading of 100, which is way too high. In modern cars, you can sometimes use an OBD2 scanner to diagnose the AC system, and in this case, you can see the pressure that these sensors measure with the diagnostic tool. This item: A/C Compressor Kit - Compatible with 2008-2012 Ford Escape. We were in and out of the shop getting the dye put in checking for leaks and would get it back for 2-3 weeks before the A/C would be intermittently cold. Perform these next steps with the engine turned off. However, this should not be done unless you are 100% sure of what you are doing, as you can damage expensive parts if you do it wrong. If there is no voltage, continue troubleshooting. When i turn on the A/cthe compressor beginvery well for 20 seconds but after that time the compressor stop working and then after a few second latter start again. Cold air started blowing again! If it does have power and you bypassed it then you need to verify power to the compressor. Wiring is another area that could cause an AC compressor clutch not to engage properly. Check the clutch plate for signs of rust. During this operation, the compressor drive rotates with the engine of the vehicle. However, it normally makes more sense to put in a new AC compressor. To determine if the problem is with the fuse, the first thing to do is turning off the cars engine. However, this is seldom the case today. This action will help your compressor maintain its good workings. Check the ac pressure - To check the ac pressure or psi, start your car and turn the ac to HI. Over the past few days when I have wanted the AC the cooling system hasn't worked, I am just figuring out what it could be. Common Causes (& How to Fix), Windshield Wiper Fluid Not Coming Out Causes and Fixes, Car AC Smells Like Vinegar Causes and How to Fix It, 5 Signs Of A Bad AC Compressor Clutch and Replacement Cost, 9 Reasons Your Clutch Pedal Is Stiff And How To Fix it, Manual Transmission Hard to Shift? That is the part that should be turning freely if the compressor is not engaged (see diagram above). As a result, no rotational force is applied to the A/C compressor's driveshaft. Condenser may be blocked. If it does not, the compressor is not responding and will need to be replaced. sambooka (2012 - 2023) Ford Fusion Battery Sizes & Specs (2006 - 2023) Ford Ranger Battery Sizes & Specs (2000 - 2023) If they are not having to add any refrigerant, or are doing so only because they dont have a clue what is wrong, it sounds like they are not diagnosing the problem and Id also say take your car elsewhere. Is it possible for it to be leaking but to have the pressure check out OK? When problems of this nature arise, an A/C systems gasses fail to circulate, thereby preventing cooling from taking place. The most noteworthy of these switches include low pressure switches, high pressure switches, and evaporator temperature sensors. 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