See Also: 8 Reasons Your A/C Is Not Blowing Cold Air. 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. Inspect the harness to make sure that it doesnt have any opens or shorts. Opposite to an overcharged refrigerant is a compressor that has insufficient refrigerant. Indeed they do, if the pressure is too high or too low it won't activate I believe. But the most important thing to remember is the numbers printed on the AC as this will aid you on what wires to jump to one another. Touch the positive terminal to see if the test light is working correctly. However, this is seldom the case today. Read on and learn how to diagnose and fix AC compressor clutch issues. Need the manual, really. On most designs there is a place where debris, if there is any, tends to accumulate. Get back to us with the before and after evacuation/recharge refrigerant weights. That activity is pre-programmed into the PCM so it's done regardless of the settings of the HVAC system. Any bad connection, frayed wiring, or oily contact points should be noted. Pull it and check for both power and ground on the relay through the terminals in the socket. Leighton198 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. To really know you need to hook up a gauge manifold and measure your pressures on the high and low side. How to Manually Move A Power Seat: A Step-By-Step Guide. DaveOM If I find something out from my mechanic, Ill give you guys an update. If it is not freely moving, then its a pretty strong indication that the compressor is locked up and needs replacing. . 2. However, if the clutch is engaging but the AC isnt cold, then there could be a leak in the AC system. . 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. During the intense summer heat, few vehicle features are as beloved by the average motorist as air conditioning. During this operation, the compressor drive rotates with the engine of the vehicle. Stephen Interior Leave a comment 7,609 Views. No, old AC compressors with a clutch should not spin all the time. At idle, it will stay on for about 3 seconds, then disengage for about 3 . #2. Aug 19, 2018. Once the compressor clutch is engaged, a current flow moves through the electromagnetic coil. Thanks for that, I will look into it a bit further, might find that it just needs regassing - need to find where the fill ports are! January 2022 Jason, MAZDA6 shuts down while driving fuel pump not monitored, may be no engine light etc. 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. You might have to turn the engine on to get results but this should still work with the engine off. My Explorer did this in 92/93/94one 60 cent oring and its been good since. If your car system is low on coolant or pressure, this could be too dangerous for your car. This is a full explanation of how the system works. 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. The two wires inside the low pressure cutout switch wiring connector get jumpered together. Warm Air is Blowing. Is this normal? That's the only way to tell what's really going on. Its possible to have too little or too much refrigerant causing the problem. Its meant to engage and disengage the compressor pulley from the drive. I think the puff of smoke coming out of the vents is unrelated. Clear editor. Either way, the clutch could fail to disengage. Plenty enough to get it to engage. However, most car AC systems now use an electromagnetic clutch piece that engages the compressor to spin the air conditioning unit. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem . Started December 2, 2020, By Without this energy, the armature plate and compressor belt become disengaged, so the clutch will no longer be active. Its located next to an electromagnetic coil. Ford Escape AC Compressor Not Engaging: How to Check and Fix. Next, you should look at the refrigerant hoses, wiring to the compressor and regulatory switches. If current draw is 2.5. 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. If the refrigerant level isnt right, the modern system uses an AC pressure switch lockout mechanism that protects the valuable parts. If the pulley and the clutch are both spinning it shows that the clutch is engaged with the pulley correctly. The clutch is operated by an electromagnetic switch in most vehicles. 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. Condenser may be blocked. 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? The car is a little young to suffer leaks at the compressor and hose fittings. 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. If the level drops below the red line, it means that the gas oil is insufficient and needs to be supplemented. Your shop should know where that spot it for your cars AC design. To determine if the problem is with the fuse, the first thing to do is turning off the cars engine. Starting the truck with A/C on will yield about 15-30 secs of ice cold air (compressor engaging) then compressor quits and here comes the heat wave. Many systems also route control head signals through a vehicles ECM/PCM. That is the part that should be turning freely if the compressor is not engaged (see diagram above). The #1 Ford Explorer enthusiast resource for over 25 years! If the fuse is fine, then you need to check the clutch relay. These include your Fuse, Coolant or Refrigerant, and Compressor Oil. You can jump-start the clutch to see if it will get moving manually. Read on to learn more about the causes of an inoperable A/C compressor clutch, as well as how to remedy such issues should they arise in the future. If you begin to notice that the AC system is not blowing as cold as it used to, then that may be a sign that the switch has failed, or is beginning to fail. If the air conditioning isnt working, the problem could be the AC clutch. 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. Inspect with the Engine Off . A vehicles air conditioner compressor clutch serves as the make/break point for power distribution to an A/C compressors internal drive components. 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. With time, a compressors clutch assembly can begin to show its age. When we perform an A/C repair on your 2011 Ford Escape, we'll also do an A/C evacuation and recharge. Turn the AC controls to maximum air conditioning. In some cases, the wiring may be fine but the harness is the problem. If so, try the troubleshooting techniques described here. (2012 - 2023) Ford Fusion Battery Sizes & Specs (2006 - 2023) Ford Ranger Battery Sizes & Specs (2000 - 2023) Ill just echo the majority here and saytake your vehicle to an independent AC shop. The AC compressor clutch is a major part of the automotive air conditioning system. It is also a simple replacement to do. m1tch, First, turn ON the AC and fan to the maximum. Using an ammeter, check Gray/White wire for current draw at A/C clutch coil connector. When the engine is on. If you turn on the AC and immediately hear a rattling noise, there are a few potential causes: Compressor: If your AC compressor is beginning to fail, it can make a rattling noise. If there is a ground wire, you should also check the ground. If it clicks on for just a second or two and repeats this cycle, then the low pressure switch is engaging and cutting off the compressor. Check the clutch plate for signs of rust. Who doesnt love road trips? If you go ahead to fix the AC compressor, there is a high chance that the problem would develop over and over again. - My E350's AC was not working (clutch not engaging) so I added two cans (22 oz.) -or-. Mine blows very cold, no matter how hot outside it is. Pennzoil vs. Mobil 1 Oil: Differences & Which Is Better? The best remedy for this is getting your A/C serviced. 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. This pressure pushes the refrigerant through the rest of the system. . Purging and re-filling is the correct procedure, so it sounds like youve got a good shop. Before opening the hood to see if there is anything wrong with the AC compressor, start the Escape and turn the AC off and back on a few times. 3. Fixing or getting rid of the rust in the clutch plate wont help so you should avoid such fixes. The a/c clutch normally uses a 10A fuse. 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. To check these, you can often measure them with a multimeter. Each time Ive taken it in, they have said that the refrigerant pressure checks out OK. 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. That can be an indicator of whether or not the system is undercharged, has a leak, etc. Bypass the 3 wire AC pressure switch through B1 to B4. If the pulley and the clutch are both spinning it shows that the clutch is engaged with the pulley correctly. 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. 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. Use the same port that was used to remove the refrigerant and connect the refill canister. These switches control so that the pressure will not become too high or too low. 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. However, when the AC pressure switch goes bad, warm air might be all you get. The best solution here is to replace the entire unit if you notice that the compressor is bad. Fill it up until the pressure indicator on the refill . If you have no power then it will not engage the compressor. Air is cold. Notes: A/C install kit, Includes: Filter Drier, Expansion Valve, Compressor Oil, Necessary O-Rings and Gaskets, Cap and Valve Kit. Thanks Ken. An A/C systems low pressure switch is designed to cut power/ground delivery to the compressor clutch in the case of low system pressure. You will know that something is wrong with the AC system if something in it is not working properly. 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. Castrol Edge vs. Mobil 1 Oil: Differences & Which Is Better? Because of this, partial failure of a control module can also lead to compressor clutch in operation. Performance upgrades, maintenance, modifications and problem solving. Your link has been automatically embedded. Normally it's just a regas. Fix an Air Conditioning Not Working Video. Sounds to me like you have a leak somewhere. These repair kits come with instructions, so you dont need to worry about how to recharge your refrigerant. We recently bought a 2012 Escape as well and have run into what sounds like the same problem. We recommend starting with the power wire to the AC clutch. The same applies if the freon pressure is too high. What is the AC clutch and how does it work? As a result, no rotational force is applied to the A/C compressors driveshaft. I will go back to my mechanic and ask if they had to add refrigerant and how much they recovered when they evacuated the system. However, it normally makes more sense to put in a new AC compressor. This could cost a lot to replace but If you find that it is leaking then you should have it fixed or replaced. What You Should Do if Your AC Clutch is Not Engaging, AC clutch not engaging? Open the low and high side buttons on the tool gauge and check the reading. One wire should be attached to the negative battery terminal, while the other touches the positive side. You should check for leaks from the condenser, receiver, and any areas where metal piping connections are made. Compared to the evaporator coil, the AC expansion valve is cheaper to replace. 0 %. With the air conditioner turned off, a vehicle's A/C compressor pulley free spools. Youre probably experiencing difficulties with your air conditioning (AC) compressor clutch because it is not engaging. Escape A/C Recharge. (Or Is It Just a Convenience? Then focus on the compressor clutch. Upload or insert images from URL. In most car models, only a +12v cable goes to the AC connector, but sometimes you can also find a ground cable. 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. 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. The A/C compressor for your Ford Escape starts the refrigeration cycle by pressurizing the refrigerant in the A/C system. Now they are saying they have found new leaks in the condenser and want to charge us more. Your previous content has been restored. The A/C stopped blowing cold air shortly after that. 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. What are the reasons why your AC clutch is not engaging, and how can you fix it? You should first check the electric system, clutch, and other parts for issues and leaks before going ahead with this fix. 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? . Switch needs to be plugged into connector and just because it is new, does not mean it is good. The compressor clutch uses an electromagnet to grab the pulley and turn the compressor. What, if anything, could I try to diagnose? If you haven't bought one, don't. Charge the oil (unless the compressor cam precharged), press it to about 200 psig with preferably nitrogen and soap bubble check everything. Another possible cause could be leaks in the AC system. Or they charge it, then cant find a leak? Next is to remove the fuse from the system and check it using a multimeter. You should check the following areas before making any new fixes. Do this quick check to know why. It can also be caused by a faulty high or low AC pressure switch, a blown fuse, a bad AC clutch or a bad electrical connection. No problems since then (two years ago). Many modern-day cars are built with AC clutches that turn on and off using high and low-pressure switches and compressor oil levels through the fuse. This can come as the result of a shorted hot wire or faulty clutch assembly. The Best Torque Wrench Digital or Dial Type? What Happens When There is Oil in The Coolant Reservoir? If the clutch kicks on at first I doubt it is that. If there is no voltage, continue troubleshooting. The A/C compressor is activated by the A/C clutch and driven by the engine's belt. -or-. Add oil if the level is below the normal point. If this circuit is traced the fault of a open circuit can be found out. They did an evacuation and recharge of the system. Options. That is why the pressure switch is there. 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. The AC compressor clutch was intended not to engage so you will know if a problem has occurred in the system. If it engages, the clutch gap is too wide. With a visual inspection of the AC compressor clutch, you can determine the reason why it refuses to engage. 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. Low AC pressure will prevent the relay from sending power to the AC compressor clutch. It may be because the vents are covered with frost. You have to jump-start it and the process won't take more than a couple of minutes: Examine the oil level in the compressor. Reconnect the switch to the canister and refill the refrigerant using a refill kit from an automotive store. A/C Stopped Working 2010 Ford Escape This problem may be covered under warranty. might look to manually run the AC pump directly at the clutch end. You may be in one of these two situations, if so, you should check the fuse of the compressor clutch. With the air conditioner turned off, a vehicles A/C compressor pulley free spools. Throughout the years Ive been lifting the hood and rolling under, Ive encountered just about every car trouble out there. 2012 Ford Escape 3.0 last week my AC went out! 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. 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. That is why the pressure switch is there. After inspecting the belt, there can only be two things left that could be happening: 1. But this is just a symptom. RELATED: 5 Signs Your Cars AC is Low on Freon (& What to do). There are many reasons why an AC clutch does not engage. That happened last Fall, so we waited until this spring to try again. Thats why Ive decided to put up my very own website. They checked for leaks but found none. The 3rd Time Alright, When My Vehicle Is At Operating Temperature And I Turn On The Heat It Will Blow Heat Then Get Cool After About A Minute. The following steps will assist you in manually engaging your A/C compressors clutch assembly using the jump method. 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. Check your owners manual to find the fuse for the AC clutch. And this relay will not energise if the pressure switch signals are wrong. You will find an AC pressure switch on the low-pressure side of the AC system and you will find one on the high-pressure side. Started Tuesday at 12:48 PM, Ford Owners Club Antonsd Certified Automotive Diagnostic Technician. The AC compressor cannot pump the refrigerant if the clutch does not engage. Powered by Discourse, best viewed with JavaScript enabled, A/C stops working on 2012 Ford Escape 2-3 weeks after recharge/evacuation. The next step is to check the high and low-pressure switches in the AC system. Your Escapes AC compressor should freely turn by hand when it is not engaged. This process engages the plate, along with the compressor belt. Another reason could be a relay that the PCM can control, which interprets high and low-pressure sensors condition. July 21, 2016 in Ford Fiesta Club. Above that, it only blows out hot air. In turn, the A/C system clutch disengages. When the AC is turned on, the clutch gets electrical energy. If the clutch does engage manually, you are looking at some rarer issues. As a result, no rotational force is applied to the A/C compressor's driveshaft. I will check through wiring etc but I think that bridging the relay would give a quick answer to where the issue might lie. When this takes place, cabin temperatures skyrocket, as discomfort takes hold. Tiny bits of metal can clog your AC condenser. You dont want to turn the pulley where it is attached to the belt. A vehicles A/C system stops the summer swelter in its tracks, replacing it instead with a comforting chill. The last thing you want to deal with is a hot car cabin. 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. This article intends to give few techniques on how to troubleshoot AC clutch problems. What have you tried so far? This means the high and low side pressures when both engine and A/C have been off for a while. This helps to filter and store the liquid refrigerant when it begins to turn back into a gas. $8499. 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). Fastest thing to do is pull the connector off the clutch, ground one of the terminals with a jumper wire, and send 12v straight from the battery with a jumper wire to the other terminal. Ensure that your engine is turned off when performing this inspection. 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. Fv 27, 2023 . Previously the air didn't work when set at level 2 and 3 of the four levels. Martian. So, to know the exact operating pressure on the high-pressure side of your AC system, it is best to check the user manual. Obviously, youd want to do this with the vehicle off. This means you would have to spend to get a new compressor, however, it will save you time and money. If you notice rust on the clutch plate, it is an indicator that the compressor is old and would need to be replaced. Any ideas why its not lasting? of r134a. 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. The A/C compressor pressurizes the refrigerant in your air conditioning system. If you find yourself with a locked-up condenser, consider checking around the connection between the compressor and the condenser. Also route control head signals through a vehicles A/C compressor pulley free spools get back to with! 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