There is a relay on the top of the compressor that allows the clutch to engage. Check to see if it is bad by removing the relay and use a wire as a jumper while the car is running to see if the clutch engages. If the clutch engages once the jumper is in place then the relay is bad it cost under twenty dollars to replace.
Check the pressure switch to the AC. migh be loss or refrigerant in system. Safety pressure switch will shut compressor down when pressure is below specs, it saves your compressor. Have a/c checked...........Mike
If the compressor has stopped running altogether the AC will not work.
Look under the air filter box I have a 91 and its there
If you added refrigerant, was the compressor running better before or after you added refrigerant? Compressor cycling on-off can be caused by defective low pressure switch (very rare on Subarus), or low on refrigerant. Best to test with a good refrigerant gauge-- resting pressure (system off) should be between 45 and 80 psi (higher pressure with higher temperature) on the suction side. Make CERTAIN you attach the gauge to the suction side (the side with the larger diameter hose). When the compressor cycles on, if suction pressure drops below approx 23-29 psi, the low pressure switch will shut off compressor to prevent damage. If low suction pressure, cure is to add refrigerant, little at a time. NOTE: Refrigerant is under high pressure, and is very dangerous. If you are not trained to handle refrigerant, suggest take this problem to a shop to check out.
There are several ways to fix an exe program that has stopped working. You can run the program again after an automated troubleshoot. You should also install the program and install it afresh.
The head pressure and compressor current would normally rise (strong winds and/or rain and/or very low air temperatures will reduce this effect). Less heat would be removed from the refrigerant and therefore deliver less cooling.
2004 ford expedition front blower not working
The air compressor takes time to shut down fully so it can't stop as soon as Ur veichle has stopped
If the system is low on refrigerant the low pressure switch will shut the compressor down. If you run a jumper wire across the two terminals on the low pressure switch on the dryer ( long silver canister on passenger side rear)you will kick on the compressor and be able to add refrigerant; then it will work.
the compressor was working and now it has stopped, the clutch spins free but when i put my tester to the wires that connect to the compressor there is no power and the clutch dose not jump on can you help.
Check blower motor fuse Check to see if compressor is working
By applying enough pressure