The AC relay (number 20) reads good voltage to the relay outlet. ANY good A/C shop will solve this riddle in short orderits all they do. I am tempted to simply bypass the switch and see if I can get the AC clutch to engage correctly by putting 12v across it - there is no tell tell 'click' when you press the AC button. Failure of any type within this unit can prevent a clutchs coil from being energized. This is a full explanation of how the system works. How much does a Car AC Repair cost? Check other compressor parts: The condenser . Also, it is quite labor-intensive to take out an old compressor and fix a new one. The clutch isnt going to normally wear out when its newer. When the engine is on. 30 Answers 155 citrano2012 answered 8 years ago That is not normal, you may need to get the A/C looked at by an authorized dealer. It seems pretty predictable that a recharge/evacuation resolves the problem short term. Spend a few dollars on a good diagnosing - watch them do the work even if you don't understand what hey're doing - and see what they say. Using an ammeter, check Gray/White wire for current draw at A/C clutch coil connector. 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 why the pressure switch is there. At idle, it will stay on for about 3 seconds, then disengage for about 3 . Inspect the harness to make sure that it doesnt have any opens or shorts. The clutch resembles a friction plate. Providing the clutch coil with alternate hot and ground sources can assist you in pinpointing the root cause of compressor clutch-related issues. Need to fix your car's air conditioner? That could explain why it works for a while, then stops working. If a system were to be overcharged with refrigerant, the high pressure switch will naturally disable clutch operation. Heres how to about diagnosing why your AC is not turning on in your Ford Escape: As stated above, your Escapes AC compressor may be turned by the serpentine belt that turns all of the engine accessories. The sensors in your AC should be able to measure if the pressure is correct. Started Sunday at 04:53 PM, By However, most car AC systems now use an electromagnetic clutch piece that engages the compressor to spin the air conditioning unit. Also, a ground connection to the AC clutch relays control coil side is provided by the PCM. Alexdeltaron With this force, the coil is pulled toward the plate, which gives the pump rotor the power it needs to run the compressor. Ill also update when I get a resolution to the problem. Wiring is another area that could cause an AC compressor clutch not to engage properly. Do you have 12V out of the pressure switch on the red/yellow wire? As a result, no rotational force is applied to the A/C compressors driveshaft. Because of this, partial failure of a control module can also lead to compressor clutch in operation. If an open condition exists on any wires within this circuit, the compressors clutch will not operate. The AC compressor pulley is always being turned by either the serpentine belt or a dedicated belt (its going to depend on the model year and engine type). Symptoms. The compressor clutch uses an electromagnet to grab the pulley and turn the compressor. If nothin happens, ac clutch bad. Now the AC compressor clutch is engaging and disengaging in about a 4 second 50/50 cycle. Compressor does not run in any AC mode. You can jump-start the clutch to see if it will get moving manually. We took it to our mechanic (who I trust). If so, try the troubleshooting techniques described here. Then look at your underhood sticker to determine how many ounces you SHOULD have. You should check the following areas before making any new fixes. It is also a simple replacement to do. Common Causes (& How to Fix). My A/c Blows Warm Air No Matter What Setting It Is On. Do Not Sell or Share My Personal Information. 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. Is this normal? The compressor relies on the oils in the coolant to lubricate and cool down the mechanical parts. Key on, engine off, test for 2 powers at the relay cavity. Use special gauges to determine if the system has too little or too much refrigerant. The AC compressor is empowered by the flywheel of a cars engine. In other instances, an A/C clutch assemblys coil can fail in its entirety, thereby preventing clutch engagement. Youll need a jump wire. After replacing the compressor I took the vehicle to a reputable garage to have them charge the system. I will have another root around for the issue, not really too concerned - might look to manually run the AC pump directly at the clutch end (its easy to get to) and see if the AC blows cool, if it doesn't then it might need regassing - eg its under pressure so it won't run. To check these, you can often measure them with a multimeter. Performance upgrades, maintenance, modifications and problem solving. We took it back to the mechanic. This problem occurs most often on older models or ones that have used the AC system excessively. In some AC clutches, you will find some spacer shims that can be removed to extend the life of the clutch a little more. It should spin only when the AC system is activated and functional. Started 15 hours ago, By Check the clutch plate for signs of rust. You should be able to reference a diagram in your cars service manual. The most common problem for that symptom is the fan relay burns out, and the A/C comes on strong but then overheats quickly making the pressure in the condenser get too high and the pressure cycling switch automatically turns off the A/C. The Ac Works Ok After A Little While On, But Not Like It Use To. No, if the Freon level is too low, it will not engage the AC clutch. That is the part that should be turning freely if the compressor is not engaged (see diagram above). SEE, I think it's a 15 pin plug and two wires change on the plug fro 95 to. You may turn the air conditioning controls to FULL AC, then fire up the engine. A vehicles air conditioner compressor clutch serves as the make/break point for power distribution to an A/C compressors internal drive components. Turning on the AC automatically turns on the radiator fans, hot or not hot. If this doesnt start the clutch, the clutch needs to be replaced. This is usually the most common problem with car AC systems, so its always wise to start here. Get at least 20% off selected Ford parts on eBay View parts on eBay now! m1tch, If there is a ground wire, you should also check the ground. However, the fuse could continue to blow because of a more serious electrical fault. With the clutch plate worn out, the clutch may not be able to engage. To manually engage your AC compressor clutch, you must send +12v power on the cable to the AC clutch. The last thing you want to deal with is a hot car cabin. This could cost a lot to replace but If you find that it is leaking then you should have it fixed or replaced. 1861cp The bypass you tried relies on the fuse listed to have power to the relay. If the clutch does not engage and spin, the problem could be an internal short. If the clutch does engage manually, you are looking at some rarer issues. Paste as plain text instead, Get back to us with the before and after evacuation/recharge refrigerant weights. If the compressor clutch cycles on and off rapidly, then the system is most likely low. 250 PSI / 50 PSI = The system is overcharged and the condenser is not cooling. Your cars AC system contains many electrical wires and connections. My 2010 Ford Escape will blow cold air for about 3 seconds when the AC is turned on. Stephen Interior Leave a comment 7,609 Views. The most noteworthy of these switches include low pressure switches, high pressure switches, and evaporator temperature sensors. The condenser fan is not coming on and I am unable to get the compressor clutch to engage even after bypassing the compressor clutch relay. He has been working as a car mechanic for over 10 years, and the majority of them specialized in advanced car diagnostics and troubleshooting. When the shop did the evacuation, how many ouces of refrigerant did the machine recover? We use cookies to ensure that we give you the best experience on our website. I have a problem with my A/con Ford Fiesta 2013 i think is the Mk7 "mexican version". If it is not working properly, consider replacing it with a new one. We recommend starting with the power wire to the AC clutch. Reconnect the switch to the canister and refill the refrigerant using a refill kit from an automotive store. Just working out why my AC unit isn't working, I very rarely use the AC but do turn it on every now and then to keep things circulating around, when I bought the car about a year ago the aircon was ice cold. If there are two belts, theyll both be attached at the crank pulley. (4 Causes and How to Fix), Does Cruise Control Actually Save Gas? Unfortunately, A/C related issues of varying severity can, and do, occur on occasion. Just like any clutch, its possible that it has simply worn out. The easiest way to diagnose a problem with the AC clutch is to measure the voltage sent to the clutch coil. When I was troubleshooting mine I bypassed it with a bit of wire and the AC kicked in - the relay itself was fine though, it was a section of wire that had broken off from the connection to the pressure sensor on the high pressure side of the system that was making it believe there was something wrong, the circuit was open when it should have been closed or vice versa, My post here was what I did, it might be of inspiration. If the air conditioning isnt working, the problem could be the AC clutch. There are many ways for AC compressor clutches to receive power. 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. ), 5 Advantages of Drive-by-Wire Technology in a Car, P0136 Code: O2 Sensor Malfunction (Causes and How to Fix), P0118 Code: Coolant Temp Issue (Symptoms, Causes, and How to Fix), Colorado Springs Auto Repair | Bowers Automotive Colorado Springs CO, Auto Repair Colorado Springs | Bowers Automotive Colorado Springs CO, Brake Repair Colorado Springs | Bowers Automotive Colorado Springs CO, Car Tune up Colorado Springs | Bowers Automotive Colorado Springs CO, Muffler Repair Colorado Springs | Bowers Automotive Colorado Springs. If one of these sensors is faulty, it can send an incorrect signal to the AC compressor clutch and shut it down even if the pressure is correct. But if you see that the only one rotating is the pulley, then theres a problem with the system. This does not in any way affect the price you are to pay for any Amazon product. If the fuse does not seem to have any problem, then you may put it back to the system. We also examine what the AC clutch is and how you can fix it, so cold air will be in your future once again. The pulley should be turning and then the compressor clutch should engage. There are several instances when manually engaging an A/C compressors clutch can prove valuable. Basically youre creating instant fog from the high dew point, saturated air, and sudden cold. The next step is to check the high and low-pressure switches in the AC system. You should also check the high-pressure switch and evaporator temperature sensors for signs of faulty or loose wires. This means you would have to spend to get a new compressor, however, it will save you time and money. I also talk about other relays that you ca. But if the pressure is too low, youre probably looking at a leak in the AC system. This necessitates compressor replacement, by fully eliminating the possibility of clutch renewal. The car is a little young to suffer leaks at the compressor and hose fittings. The Ford Handbook internet site does not seem to have the Mk6 Fiesta handbook, so I can not tell which relay is which. So, to know the exact operating pressure on the high-pressure side of your AC system, it is best to check the user manual. The Compressor Is Cycling More Often Than I Recall. Let us now learn how to manually engage the AC compressor clutch. Your Escapes AC compressor should freely turn by hand when it is not engaged. Something else is the problem. Started 12 hours ago, By Started 12 hours ago, By These include low or excess refrigerant and insufficient oil. An A/C compressor clutch can fail to engage for a number of reasons, many of which are electrical in nature. Started 12 hours ago, By You will know that your AC expansion is not working correctly when the AC compressor does not turn off. It is a 2010. Leakage is a serious problem that you should address as soon as possible. Mechanic's Assistant: Are you fixing your Escape yourself? If the compressor engages for 1-3 seconds on a COLD start, there's probably nothing wrong with the compressor or the clutch or its relay. Display as a link instead, Definitely dye should be added so that any leaks can be found. the receiver/dryer is running short of liquid. Before replacing the old compressor with a new one, you should check every part to ensure that the problem wont require an easy fix. TYC 3782 Condenser Assembly Compatible with 2009-2012 Ford Escape. Perform these next steps with the engine turned off. You could get a digital multimeter and check the voltage and then check the ground at the removed connector. If the clutch kicks on at first I doubt it is that. Here is to hoping its a 60 cent o-ring. Itll often be located by electric fans. The evaporator coil is found inside your cars cabin. RELATED: 5 Signs Your Cars AC is Low on Freon (& What to do). You will need a wire crimp tool because the connectors are small. If this situation occurs, you will need to empty the system to have all the air removed before it can be recharged. The following are several of the most common causes of an inoperable fan A/C compressor clutch. From you description, it sounds as though the system isn't building enough pressure, and by relation enough heat to turn the cooling fans on. I have mot. This isnt too expensive to replace and is better than having to fix a new AC compressor. [/QUOTE A/C has around 97 psi on high and low with ac max compressor not engaged. Let it bleed until it reaches the right level of pressure. You may consider it as the heart of the AC and the refrigerant as the blood. It could even be missing entirely without you noticing if it is an independent belt. Previously the air didn't work when set at level 2 and 3 of the four levels. Start the engine, and then see if the clutch and the pulley are running. 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