![]() The sensors in your AC will measure if the pressure is correct. Low coolant might be another reason why the AC compressor clutch is not engaging. Using this can help refill the AC and stop small leaks. Here is a refrigerant leak stopper and refill. It can come in handy if you don’t know where a leak is Make sure it is compatible with your refrigerant type. ![]() You can also try a refrigerant leak detector and then get a can to stop the leak.Here’s a video that explains how to find a leak using a florescent dye – How to Find AC Leak In that case, you’ll need to find the possible leak. If the clutch is engaging, but the AC isn’t cold, there could be a leak in the AC system.If you’ve waited several minutes while the engine is on and the AC is turned to maximum, and the clutch still isn’t engaging, there’s something not working correctly.The pulley should be turning, and then you’ll need to wait, maybe a minute or so, and the compressor clutch should engage and start spinning, also. With the engine on, turn the AC to high – You’ll be looking at the serpentine belt for any issues.What to Look for During Your Visual Inspection? Check for leaks in your AC system – look for leaks from the condenser, receiver, or any areas where the metal piping connections are made.Pull it and check for both power and ground on the relay through its terminals in the socket. You need to check the clutch relay if all is fine with the fuse.The car may need to be turned on, although the engine can still be off. If you are unable to get the voltage reading, check the fuse. You could get a digital multimeter and check the voltage and the ground at the removed connector.Carefully inspect all the components of the system to diagnose the issue faster. The relay is, however, grounded by a computer in a controlled system. In some of the cars, the compressor clutch relay goes on and off due to the low-pressure switch. Before you take the next step, it is important for you to know the basics of a few components.(In addition, the high-pressure switch and evaporator temperature sensor could be faulty or have loose wires) The wire needs to be connected and in good condition to provide enough power. Check the wiring to the clutch – If wires aren’t connected properly, this could impact how the compressor is working.Check for rust around the clutch plate – Rust could be an indicator that the compressor is old and may just need to be replaced because it has worn down and become broken.Look at the compressor and check that the belt going over the pulley is in good condition – If the belt is slipping or worn, it will need to be adjusted or replaced.(CAUTION – Be aware that if you’re unsure about what circuits to test, get help or try another method so you don’t cause more problems.) Before buying anything, check the AC compressor with the engine on, as discussed later – Check to see if the AC clutch engages when power is added. If you want to purchase a power probe for the clutch, you can do that or try to use a wire, such as in the video above.Let’s make sure your AC is working well and get started. It could be anything from an obstruction in the refrigerant circuit to a loose wire. We’ll talk about the possible problems and solutions for a compressor clutch that is not engaging. You may decide to check the engine coolant and the engine oil to rule out other issues, but the clutch is the component that must function for the AC to work. If the AC is not blowing cool air into the car, you may want to inspect the AC compressor clutch and determine if you can see what might be causing the clutch not to engage.Įven if you just filled up the AC system with refrigerant, you’ll get warm air if the AC compressor can’t operate correctly. Check other compressor parts: The condenser, the drier / receiver, the evaporator coil, the AC expansion valve, or the fuse box.Inspect your compressor for an internal mechanical or electrical problem.Inspect low coolant content or pressure.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).Here are a few things you can do if your AC compressor clutch is not engaging: If the compressor clutch doesn’t engage, that usually means there’s an electrical or mechanical problem with the compressor. The compressor could have a serious issue or a small one. What could be the problem? If all of a sudden, the AC compressor clutch stops working and doesn’t engage this could be the reason your AC isn’t functioning properly. However, when you turn on the air conditioner, it only blows warm air. Imagine you’ve got a car, and it all works so fine.
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