![]() ![]() 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. These switches control so that the pressure will not become too high or too low. 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. RELATED: 5 Signs Your Car’s AC is Low on Freon (& What to do) 2. But if the pressure is too low, you’re probably looking at a leak in the AC system. Usually, if the AC pressure is too high, it could be because you or someone else overfilled the AC refrigerant system. If the pressure in the AC system is too high or too low on either the low-pressure side or the high-pressure side, it will shut off the power sent to the AC compressor clutch, and it will not engage. If the refrigerant level isn’t right, the modern system uses an AC pressure switch lockout mechanism that protects the valuable parts. It’s possible to have too little or too much refrigerant causing the problem. The air conditioning system needs the right amount of refrigerant to run properly. Here is a more detailed list of the most common reasons why your AC clutch is not engaging: 1. 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. The most common reason why your AC clutch is not engaging is that the AC refrigerant level is too low or too high. ![]() My battery as it is able to start my car cannot power on a simple power probe which is very odd.Is the AC clutch supposed to spin all the time? Common Causes of AC Clutch is Not Engaging If I'm understanding you correctly your saying that I can keep attempting to put refrigerant into the system via the can and gauge method without anything bad happening? Just wanted to make sure before I do it lol.Īlso the reason why I suspect my battery being a problem is because I feel like a certain amount of voltage (not sure how much) is needed to power the AC clutch on. If the clutch coil works then I can narrow the problem down to other items. I know engaging the clutch with the car off doesn't pull the refrigerant in however doing it when it is off will verify if the clutch coil works or not by hearing it engage. (I know it could be the pressure switch still) I've replaced the relay with a brand new one and still no clicking. Please let me know your thoughts about this and if I may have missed something or what other steps I can do to verify the relay is working and if power is going to the compressor plug or not.Ĭlick to expand.Thanks for the response! The car does start however I'm having a hard time getting the AC relay to work which is why I was suspecting an electrical issue to begin with. I also noticed no "clicking" of the relay when I had someone turn the A/C on and off.īasically I'm thinking this is an electrical issue but I'm stuck as to what to do next as the problem now seems to lie between the power connector and A/C compressor relay. However it appears there was no power going to the plug attached to the compressor. So I hooked up a test light to my battery and verified the ground was good. Now after doing all of that I figured I should make sure there is power going to the compressor in the first place. Replaced A/C line that had a crack and vacuumed system and refilled with refrigerant. Of course worst case scenario would be to replace the compressor but I haven't gone that far. First off let me state the number of things I have already done to diagnose the problem. Hey guys so as the title states my A/C clutch is not spinning with the pulley. ![]()
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