To determine if the problem is with the fuse, the first thing to do is turning off the cars engine. If this circuit is traced the fault of a open circuit can be found out. Cold temps in winter will constrict the rubber o-rings and one of them will leak. In turn, the A/C system clutch disengages. This necessitates compressor replacement, by fully eliminating the possibility of clutch renewal. Compressor does not run in any AC mode. In this guide, we cover the different problems you might encounter. Its located next to an electromagnetic coil. If the clutch does engage manually, you are looking at some rarer issues. 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This gives power to the pump rotor that keeps the compressor running. 225 PSI / 80 PSI = It is likely that the . Ford Fiesta 2013 If the fuse is fine, then you need to check the clutch relay. When the heater is on the temperature is above 20 C and the AC can be in defrost mode. There are many ways for AC compressor clutches to receive power. Mechanic's Assistant: Have you checked the Freon level? I checked the relays which are good. To check these, you can often measure them with a multimeter. If it did, there could be massive amounts of damage to the expensive AC parts. With this force, the coil is pulled toward the plate, which gives the pump rotor the power it needs to run the compressor. Using an ultraviolet (UV) leak detection light, inspect thecondenser near the receiver/dryer cap for the presence of dye. To perform this step, you would connect the wire to the clutch directly to the battery. This helps the refrigerant to turn into a gas. The clutch is operated by an electromagnetic switch in most vehicles. Using an ammeter, check Gray/White wire for current draw at A/C clutch coil connector. Display as a link instead, might look to manually run the AC pump directly at the clutch end. RELATED: Car AC Not Blowing Cold Air? that have created this guide for you so you can understand how the system works Something is telling it no to kick on. The Compressor Is Cycling More Often Than I Recall. Mechanic's Assistant: What year is your Escape? Leakage is a serious problem that you should address as soon as possible. You could hear a hissing sound if it is not working correctly. What, if anything, could I try to diagnose? It also gives an insight into how the system works. This indicates some form of wiring problem. If the pulley and the clutch are both spinning it shows that the clutch is engaged with the pulley correctly. 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. Your cars AC system contains many electrical wires and connections. Perform these next steps with the engine turned off. The AC compressor clutch was intended not to engage so you will know if a problem has occurred in 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. Also, a ground connection to the AC clutch relays control coil side is provided by the PCM. Enginge Shut Down Stop Safly Now This Messige Come Every 10 To 20 Minute. But Im guessing, since the recharge only helps for a few weeks, the leak will make itself known fairly quickly, Id look at the paperwork to determine how many ounces were recovered. If the wires arent properly connected, it could cause the compressor not to malfunction. 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. I'm not kidding about this. The AC compressor is getting a command to turn on but is no longer able to, which would indicate that it needs replacing. This is called diagnosing and fixing the problem. 2. Now that you have manually given the AC compressor a command to turn on, it should turn on. If they have to add ANY freon, then theres a leak, they just havent found it. Royal Purple vs Mobil 1: Which Engine Oil is Better? Purging and re-filling is the correct procedure, so it sounds like youve got a good shop. Click Here for the 5 best options. Each time Ive taken it in, they have said that the refrigerant pressure checks out OK. Certified Automotive Diagnostic Technician. May you find this article as helpful as we hoped it to be. 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. If you hear a thunk or clunk noise after turning the AC on, the compressor is engaging. This item: A/C Compressor Kit - Compatible with 2008-2012 Ford Escape. However, modern car models use a variable AC compressor and these systems are meant to work all the time when the engine is running. Check other compressor parts: The condenser . Plenty enough to get it to engage. Ships from and sold by Parts Geek LLC. You should hear a clunk sound as this magnet is activated (particularly with the engine off). I think you want one of those at this point. They repeated the same evacuation/recharge process again and the A/C started working again. If there are air and moisture in the system, it probably leaks. $62.21. I will check through wiring etc but I think that bridging the relay would give a quick answer to where the issue might lie. He has been working as a car mechanic for over 10 years, and the majority of them specialized in advanced car diagnostics and troubleshooting. . srpocd25 Can It Just Be Low On Hi The Best Torque Wrench Digital or Dial Type? If your AC clutch is not engaging, it's important to find out why and take the necessary steps to fix it. Alexdeltaron Just driving to nowhere alone, with your friends, or your . 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. (2012 - 2023) Ford Fusion Battery Sizes & Specs (2006 - 2023) Ford Ranger Battery Sizes & Specs (2000 - 2023) This indicates some form of wiring problem. These include your Fuse, Coolant or Refrigerant, and Compressor Oil. They did the evacuation/recharge and the air is now blowing cold again. I appreciate the help and sorry for me english it's very rusty. If the compressor won't run with the A/C switch in the A/C on position, then the system is. Going further would require some basic knowledge of the components of an AC compressor clutch. July 21, 2016 in Ford Fiesta Club. If not on, the condenser will get too hot to work, and the a/c will shut down. The A/C stopped blowing cold air shortly after that. If you jump the low pressure switch with the engine running, do it only for a few seconds. It is also a simple replacement to do. Started 15 hours ago, By 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. After inspecting the belt, there can only be two things left that could be happening: 1. Do not get the 12 volts to the clutch so cannot be the clutch. Related: Symptoms of a Bad Car A/C Condenser. There are many reasons why an AC clutch does not engage. Your shop should know where that spot it for your cars AC design. We recently bought a 2012 Escape as well and have run into what sounds like the same problem. SKU # 886341. Stephen Interior Leave a comment 7,609 Views. The same applies if the freon pressure is too high. m1tch, To really know you need to hook up a gauge manifold and measure your pressures on the high and low side. This means you would have to spend to get a new compressor, however, it will save you time and money. The best remedy for this is getting your A/C serviced. Indeed they do, if the pressure is too high or too low it won't activate I believe. If current draw is 2.5. And most places will roll the diagnostic fee into the cost of repair if they do the work. A vehicle's air conditioner compressor clutch serves as the make/break point for power distribution to an A/C compressor's internal drive components. 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. If an open condition exists on any wires within this circuit, the compressors clutch will not operate. This action will cause the fuse to blow. After inspecting the belt, there can only be two things left that could be happening: 1. In some car models, you may also need ground. You should check the following areas before making any new fixes. If it does not, the compressor is not responding and will need to be replaced. Again it will need to be vacuumed and refilled. To finish, we'll add new refrigerant to recharge the A/C . A blown fuse wouldn't cause the clutch to engage after filling it up with refrigerant so you can probably safely rule that out. You should be able to reference a diagram in your cars service manual. That is why the pressure switch is there. Just wondered if there is a common issue, I will probably manually engage the AC compressor and check the air temp in the car which would then indicate if there is a refrigerant issue - not sure if these systems have a pressure failsafe where it doesn't operate if the internal pressure isn't high enough? If there isn't enough refrigerant, the clutch may not engage. Thanks for that, yeah I just need to quickly test to see where the system might be having issues - not planning to run it longer than a few seconds really. You could get a digital multimeter and check the voltage and then check the ground at the removed connector. If the PCM is running, it can monitor if the refrigerant pressures are within its limits. How do I manually engage my AC compressor clutch? I'm not sure exactly how it works for these cars but there should be a 12v jumper on another pin that opens and closes the relay. Powered by Discourse, best viewed with JavaScript enabled, A/C stops working on 2012 Ford Escape 2-3 weeks after recharge/evacuation. 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. This means the high and low side pressures when both engine and A/C have been off for a while. Sounds to me like you have a leak somewhere. Remove the electrical connector from the dryer/receiver and jumper the two connections inside the wiring harness side of the connector together: this allows the compressor to engage in spite of low pressure/no gas in the system. 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). 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. 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. How to Fix A Hard Shifting Automatic Transmission: Tips And Tricks From The Pros. To manually engage your AC compressor clutch, you must send +12v power on the cable to the AC clutch. I also talk about other relays that you ca. 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 Compressor not included. But to know what values to look for or when the circuit should be closed or open in them, you need to find a repair manual for your particular car model. Martian. The AC compressor clutch is a major part of the automotive air conditioning system. Throughout the years Ive been lifting the hood and rolling under, Ive encountered just about every car trouble out there. 3. 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