The AC compressor is getting a command to turn on but is no longer able to, which would indicate that it needs replacing. (Radiator fan). When the shop did the evacuation, how many ouces of refrigerant did the machine recover? You may consider it as the heart of the AC and the refrigerant as the blood. If this circuit is traced the fault of a open circuit can be found out. That is why the pressure switch is there. Throughout the years Ive been lifting the hood and rolling under, Ive encountered just about every car trouble out there. Compressor does not run in any AC mode. Is the Fan behind the condenser working? [/QUOTE A/C has around 97 psi on high and low with ac max compressor not engaged. FluffyBunnyFlipFlops Cold air started blowing again! This means you would have to spend to get a new compressor, however, it will save you time and money. Started 12 hours ago, By The psi for the low side should be about 25 to 40. Mark helpful 55,895 Tracy answered 8 years ago The air seems to work when the outside temp is below 80 degrees but doesn't work for 90% of the time when the temp is higher. Started 12 hours ago, By If you go ahead with fixing the old compressor, you may have to do it several times which means you would spend a lot of money on these fixes. If the pulley and the clutch are both spinning it shows that the clutch is engaged with the pulley correctly. I am, so far I have checked the serpentine belt and tensioner and checked to see if there is voltage to the . back to AC / heater Complaints 271 Crash Tests 3 Lemon Law 7.6 pretty bad Typical. Just took it back to mechanic. 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. of r134a. Your cars AC system contains many electrical wires and connections. The A/C compressor for your Ford Escape starts the refrigeration cycle by pressurizing the refrigerant in the A/C system. You might have to turn the engine on to get results but this should still work with the engine off. $8499. Leighton198 Perhaps the best use of this practice is when attempting to determine whether or not the clutch itself has failed. There are many reasons why an AC clutch does not engage. Ensure that your engine is turned off when performing this inspection. At idle, it will stay on for about 3 seconds, then disengage for about 3 . 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. Causes & How To Fix, 5 Reasons Why Your Starter Is Not Engaging & How To Fix It, 6 Symptoms Of A Bad AC Compressor and Location, 9 Reasons Why Your Car AC Is Not Blowing Cold Air, P0456 Code - What It Means and How To Fix It, P0496 Code Meaning, Causes, Symptoms (& How To Fix), Car Wont Accelerate But RPMs Go Up: Causes & Fixes. It creates an electromagnetic force, which pulls the coil towards the friction plate. Make sure that the clutch and the pulley is spinning simultaneously. 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. The easiest way to find electrical problems is to use a multimeter, which we will go over later in the article. Goodmorning, the ac compressor on my ford escape is not engaging. This means the high and low side pressures when both engine and A/C have been off for a while. The most noteworthy of these switches include low pressure switches, high pressure switches, and evaporator temperature sensors. But, I have no reason to think it will last. Low AC pressure will prevent the relay from sending power to the AC compressor clutch. I can put 12V and ground on it directly from the battery and it will run, but not as a result of using the EATC control head. They checked the levels and the pressure was good before they did anything else. 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? Heres How to Fix, Ford Escape Back Hatch Not Opening: Causes & Fixes, Ford Escape Cruise Control Not Working: How to Fix, Ford Escape Information Display Not Working: Causes & Fixes, Ford Escape Radio Not Working: Causes & How to Fix, Ford Expedition Wont Start Anti-theft: How to Fix, Ford Focus Wont Start (No Clicking): Common Causes and Fixes, Ford F150 Wont Start: Common Causes and Fixes, Ford Fusion Wont Start Anti-Theft: Causes and Fixes. 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. 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. Car Maintenance, General Repair, Trouble Shooting, and Everything Car Related. In order for the AC Condensor to do its job it must stay as cool as it can. Need to fix your car's air conditioner? Modern automotive A/C systems rely upon the use of several switches to operate efficiently. Looking for a good online repair manual? Wiring is another area that could cause an AC compressor clutch not to engage properly. Tiny bits of metal can clog your AC condenser. 2012 ford fusion evaporator temperature sensor bypass. You dont want to turn the pulley where it is attached to the belt. Has it been verified there are no leaks at the service port fittings? Aug 19, 2018. Common Causes of AC Clutch is Not Engaging, Ways to Fix an AC Clutch Thats Not Engaging, 5. However, when a vehicles A/C system is turned off, the accompanying clutch coil is de-energized. Magnus is the owner and main author of Mechanicbase. Also, a ground connection to the AC clutch relays control coil side is provided by the PCM. Seems that my mechanic does not know what else to try. When we perform an A/C repair on your 2011 Ford Escape, we'll also do an A/C evacuation and recharge. Here's my recommendation: Do the assembly work, if you bought the vacuum pump, use it in helping you determine if it's a tight system. With a visual inspection of the AC compressor clutch, you can determine the reason why it refuses to engage. You should be able to reference a diagram in your cars service manual. Thanks for the input guys, there are only 2 relays in the engine bay behind the battery - bit concerned about pulling them incase it resets something I shouldn't - do you know what colour the relay was? Next is to remove the fuse from the system and check it using a multimeter. (4 Causes and How to Fix), Does Cruise Control Actually Save Gas? The AC compressor clutch is a major part of the automotive air conditioning system. 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. Upload or insert images from URL. 2. Started 15 hours ago, By With PAG 46. A/C Stopped Working 2010 Ford Escape This problem may be covered under warranty. (Or Is It Just a Convenience? You can also examine this for noise and smell issues. #2. 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. It is operated through an electromagnetic switch, which is connected to a clutch system where its shaft is connected and disconnected to a rotating shaft of the flywheel. Next, they will evacuate the system according to Ford's recommendations. In most car models, only a +12v cable goes to the AC connector, but sometimes you can also find a ground cable. If you dont get any voltage reading, then check the fuse. There are three reasons why the compressor clutch does not engage, especially if the sensor detects them. Stephen Interior Leave a comment 7,609 Views. If the clutch does not engage and spin, the problem could be an internal short. That could explain why it works for a while, then stops working. This action will help your compressor maintain its good workings. Started February 20, By They did the evacuation/recharge and the air is now blowing cold again. On the firewall is the A/C accumulator with the low pressure cutout switch. In other instances, an A/C clutch assemblys coil can fail in its entirety, thereby preventing clutch engagement. How do I manually engage my AC compressor clutch? Display as a link instead, 4.5 amps, check clutch air gap. Martian. How to Manually Move A Power Seat: A Step-By-Step Guide. However, this is seldom the case today. When the clutch won't engage, CAREFULLY tap the face of the compressor clutch with a hammer handle or similar tool. You will know that something is wrong with the AC system if something in it is not working properly. That is RIDICULOUS, Cheryl. If there are readings on both the high and low sides but they are not . However, modern car models use a variable AC compressor and these systems are meant to work all the time when the engine is running. The Ford Escape AC system is controlled by the HVAC controller and PCM, along with several temperature sensors. The easiest check is to look at the refrigerant levels. 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. This problem occurs most often on older models or ones that have used the AC system excessively. Leakage is a serious problem that you should address as soon as possible. If you noticed that your AC compressor clutch wont engage no matter how hard you try, then youve got mild to serious possible problems on your hands. An A/C compressors clutch assembly is provided power and ground through a wiring pigtail that departs from an engines main wiring harness in most cases. Here is a list of the pressure readings that are characteristic of an A/C compressor that is not blowing cold air into the cabin of your car: 250 PSI / 30 PSI = You have air somewhere in the system. This action will cause the fuse to blow. AutosHub.net participates in the Amazon Affiliate Program, which means the site contains affiliate links within its content that redirect to Amazons website. 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. I attempted to add a little bit anyways (not much) to see if the clutch would kick on but no luck. 5 Best Fire Extinguisher For Cars Be Ready For Fire Emergencies. When the engine is on and the AC is on high, low pressure readings should be around 30 psi and the high pressure side should be about 250 psi depending on your car. Let us now learn how to manually engage the AC compressor clutch. Hey everyone! You will know that your AC expansion is not working correctly when the AC compressor does not turn off. Read on and learn how to diagnose and fix AC compressor clutch issues. likely to be low on refrigerant. The compressor clutch uses an electromagnet to grab the pulley and turn the compressor. Paste as plain text instead, You cannot paste images directly. 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 but when i hit de the gas works again. Antonsd Please check your cars AC manual to know its right level of pressure. 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Components used in the Ford Escape AC system Cylinder head temperature sensor Engine coolant temperature sensor Evaporator temperature sensor Low pressure AC cycling switch Dual function high pressure switch Then 2-3 weeks later, my wife says she saw a puff of smoke come out of the vents (not sure if it was smoke or vapor or what). If the only rotating part is the pulley, then the clutch fails to run. . Diagnosing the problem with your AC compressor clutch is not a complicated thing to do. Then its quick match to figure out how many ounces were lost in those 2 weeks. 3. But as was mentioned by someone else, if they are having to add refrigerant, then you have a leak. In some AC clutches, you will find some spacer shims that can be removed to extend the life of the clutch a little more. Turn the AC controls to maximum air conditioning. There is an AC relay in the relay box next to the battery. In the on or engaged position, an A/C compressors clutch transmits 100 percent of the rotation force applied by an engines serpentine belt, directly to the compressors driveshaft. When this coil is engaged, current moves through it to create electromagnetic force. 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. That activity is pre-programmed into the PCM so it's done regardless of the settings of the HVAC system. Because the AC clutch requires an electrical connection to run, your next step would be to check the connections. 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. 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