Find the low pressure sensor, it should be near the receiver/dryer if you have one. Pull the connector to the sensor and see if there are connections for two pins. If so, turn on the compressor and briefly jumper the two wires. If the compressor turns on, you either have a bad sensor or low refrigerant. If that isn't the problem, you may have a bad relay, clutch, switch or who knows what without checking it further.
It is probably getting low on freon. When the system has minor leaks and the freon pressure lowers the system begins to shut off the compressor which circulates the freon through the system to protect the compressor and other components from damage. Have the system recharged, or add freon on your own. You can now get freon from many parts stores.
Either low on freon or the low pressure switch is bad. You are gonna have to put a set of gauges on it. Usually this happens when the freon leaks out of the system. If there is not enough freon in the system, the low pressure switch keeps the compressor from coming on and being burned up.
A closed system would be full of freon without any leaks and a opened system would have no freon or has leaks...........
Bearing on the compressor or from a point that you can't see. I would bet on the compressor though.
It usually means that your system has developed a leak. Your AC system is charged with freon gas. If a certain amount leaks out, a safety device prevents the AC compressor from starting. Without the compressor, no cold air.
You have to have a freon leak detector. Are you can put freon dye in the system and find a leak that way.
if you havent ever changed one before then you shouldn't mess with it, the freon inside the compressor is poisionest, it needs to be drained, new compressor installed, filled with dye to test for leaks, drained again and then re-fill with freon.
most likely low on freon. while driving the ac compressor spins faster so it might cool better with low freon at higher engine rpm. have your system charged and checked for leaks.
If the system does not have any leaks, it will last forever.
97 Cherokee ACFreon is a little low. Another ViewpointThe freon is more than just a little low. It so low that if you continue to operate the compressor without a proper recharge, it will probably ruin the compressor as its lubricating oil is circulated throughout the system with the freon, and if the freon is that low, it does not circulate, and the compressor will eventually freeze up. Get an AC professional to trouble shoot the system to correct the leaks, verify the correct amount of oil and freon recharge.j3h.
Check to see if your A/C compressor comes on during cooling. If it does, then it's probably time to recharge your freon. (Make sure you have no leaks in the system!) Most likely your A/C uses the old freon known as R-12 which is harmful to the environment. You can buy conversion kits for converting to the new system that uses R-134a. But it is best to have a trained professional do the job who can dispose of the old gas properly. If the compressor does not come on, it could mean there is not enough freon present to engage it, a fuse is out, or the compressor itself has "seen better days".
Put a dye type refrigerant and watch for leaks at fittings, hoses, and compressor Put a dye type refrigerant and watch for leaks at fittings, hoses, and compressor Put a dye type refrigerant and watch for leaks at fittings, hoses, and compressor Put a dye type refrigerant and watch for leaks at fittings, hoses, and compressor