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 can be triggered by a relay that is directly energized by conditioned high and low-pressure switches. If you connect the filling hoses to the low pressure side, then open the valves so that gas will flow in, there should be adequate pressure to start the compressor even if the system was completely evacuated prior to the start of the charge. Check the front of the compressor clutch. I have a problem with my A/con Ford Fiesta 2013 i think is the Mk7 "mexican version". Something is telling it no to kick on. Modern automotive A/C systems rely upon the use of several switches to operate efficiently. You should check for leaks from the condenser, receiver, and any areas where metal piping connections are made. Warm Air is Blowing. Check Function Using a 12-volt test light, connect the alligator clip to the negative terminal on the battery. The A/C stopped blowing cold air shortly after that. The most common reasons a Ford Escape ac isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. . Another possible cause could be leaks in the AC system. During this process, a technician will remove the old refrigerant from the A/C system. 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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). Then focus on the compressor clutch. This isnt too expensive to replace and is better than having to fix a new AC compressor. Compressor not included. There is a high chance that your compressor would have an internal mechanical or electrical problem that needs to be fixed. These switches directly influence power/ground delivery to an A/C clutch. When this switch fails, your air conditioning will only blow warm air. (4 Causes and How to Fix), Does Cruise Control Actually Save Gas? 2. Has brand new compressor, drier and not low on freon. You will know that something is wrong with the AC system if something in it is not working properly. Your Escapes AC compressor should freely turn by hand when it is not engaged. You will need a wire crimp tool because the connectors are small. Thats why Ive decided to put up my very own website. Just wondering if you ever found a fix??? Started 12 hours ago, By Turning on the AC automatically turns on the radiator fans, hot or not hot. Previously the air didn't work when set at level 2 and 3 of the four levels. Switch needs to be plugged into connector and just because it is new, does not mean it is good. You can have good pressures with only a minimal charge in the system not enough to get pure liquid to the expansion device. 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. that have created this guide for you so you can understand how the system works When the AC is turned on, the clutch gets electrical energy. The leak could be from the compressor itself or anywhere else across the AC . Perform these next steps with the engine turned off. If they have to add ANY freon, then theres a leak, they just havent found it. If current draw is 2.5. If the fuse is fine, then you need to check the clutch relay. It may even be illegal to do it yourself where you live. The Compressor Is Cycling More Often Than I Recall. This indicates some form of wiring problem. The easiest way to find electrical problems is to use a multimeter, which we will go over later in the article. Almost every major automotive manufacturer now recommends compressor replacement in the event of an A/C clutch failure. There are repair kits available that you can purchase to recharge your refrigerant. Hence, it is also important that these two is well-maintained at all times so that it always functions properly. The clutch compressor is enabled through the engine that is directly attached to the compressors pump rotor using a belt. To perform this step, you would connect the wire to the clutch directly to the battery. 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. Seems to work good when outside temps are below 80 degrees. DizzyG 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. If this circuit is traced the fault of a open circuit can be found out. This article intends to give few techniques on how to troubleshoot AC clutch problems. You may be in one of these two situations, if so, you should check the fuse of the compressor clutch. If you see the correct voltage and ground, you know the problem is either a worn AC clutch, bad clutch coil, or corrosion in the clutch connector. Ill also update when I get a resolution to the problem. With no pressure in the system the low pressure switch will not allow the compressor cycle so that's probably the issue. 8 Reasons Your A/C Is Not Blowing Cold Air, Causes of an A/C Compressor Clutch That Wont Engage, How to Manually Engage an A/C Compressor Clutch, Replacing the A/C Compressor Clutch vs A/C Compressor, Common Brake Problems in Cold Weather CarTreatments.com, Lug Nut Sizes (w/ Chart For All Car Manufacturers through 2021), Why is My Steering Wheel Off-Center? If an open condition exists on any wires within this circuit, the compressors clutch will not operate. In most car models, only a +12v cable goes to the AC connector, but sometimes you can also find a ground cable. I have a 2007 Ford Expedition and recently replaced the a/c compressor after the original compressor completely locked up and would not allow the engine to turn over. [/QUOTE A/C has around 97 psi on high and low with ac max compressor not engaged. Sometimes they can get a little stupid and leak profusely.). Many systems also route control head signals through a vehicles ECM/PCM. Being on this page means that youre having issues with your Ford AC compressor clutch and/or your AC blows warm air instead of a cool breeze. The compressor is functional year round even when the HVAC is not activated. . Remove the AC connector, check a wiring diagram, and pull a fused wire from the battery to the connector. Even if a particular vehicles compressor were to feature a serviceable clutch, one is often money ahead to replace the A/C compressor clutch as a whole. No problems since then (two years ago). We took it to our mechanic (who I trust). Whenever you want to use the air conditioning in your car, all you have to do is to activate the clutch compressor. You can do this in under 2 minutes with a test light. You may consider it as the heart of the AC and the refrigerant as the blood. First, turn ON the AC and fan to the maximum. Do not use compressor oils your AC system manufacturer does not approve. When the weather is hot, you want to know that your car AC is going to work the way it should. In this guide, we cover the different problems you might encounter. Started Tuesday at 12:48 PM, Ford Owners Club You may also notice a bad smell when you turn on both heat and AC. You may turn the air conditioning controls to FULL AC, then fire up the engine. The clutch resembles a friction plate. Cold air started blowing again! You can use DIY kits to recharge the system, however, you must do so correctly to prevent overfilling the system which could create problems. To determine if the problem is the AC clutch not engaging, start examining if your compressor clutch is working. If there are readings on both the high and low sides but they are not . 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. 15 people found this helpful. It is also a simple replacement to do. Who doesnt love road trips? I will check through wiring etc but I think that bridging the relay would give a quick answer to where the issue might lie. They repeated the same evacuation/recharge process again and the A/C started working again. Need to fix your car's air conditioner? No, if the Freon level is too low, it will not engage the AC clutch. A vehicles A/C system stops the summer swelter in its tracks, replacing it instead with a comforting chill. Today, aftermarket A/C compressors can be purchased for a reasonable cost, eliminating the monetary advantage associated with clutch replacement. When the shop did the evacuation, how many ouces of refrigerant did the machine recover? Started December 2, 2020, By However, when a vehicles A/C system is turned off, the accompanying clutch coil is de-energized. Sounds to me like you have a leak somewhere. This is called diagnosing and fixing the problem. Can It Just Be Low On Hi After replacing the compressor I took the vehicle to a reputable garage to have them charge the system. 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. Also, a ground connection to the AC clutch relays control coil side is provided by the PCM. Do it somewhere quiet. Started 2 hours ago, By If it is not the refrigerant that is the problem, it may be because the oil level is low and needs to be replaced. FluffyBunnyFlipFlops To check these, you can often measure them with a multimeter. Ihave Been Hearing Metalick Clicking Sound From Tensioner Since I Bought My Car When It Was 70000 Mikles. Do this quick check to know why. Magnus is the owner and main author of Mechanicbase. Do you have 12V out of the pressure switch on the red/yellow wire? These include low or excess refrigerant and insufficient oil. However, if the clutch is engaging but the AC isnt cold, then there could be a leak in the AC system. Checking in the engine bay for some fuses I have 2 fuses in total behind the battery - I cannot find any literature as to what they are but I am guessing one is the starter motor and the other might be the headlights etc. 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. Inspect low coolant content or pressure. When you turn on both heat and AC several switches to operate efficiently oils your AC system AC! Conditioning controls to FULL AC, then theres a leak, they just found... 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