I think it is related with the ccrm. The compressor clutch is on with the key and I dont know if the compressor clutch off with the lower pressure switch. If any body know how to fix this problem, please help me.
Effectively, the clutch engages the minute I turn the key on and stays on. Let me be more clear. Actually I replace the compressor and I think that was the cause of its damage. Now I have unpluged the compressor cable to avoid that the compresor died again. I will try to check the a/c on/off button again. however, the a/c pressure switch could be the cause of this problem?
The power actually runs from the switch in the dash, to the pressure switch, then to the compressor. The other thing that concerns me is that the compressor isn't cycling on and off. That cycling is controlled by the pressure switch and it being on constantly can damage the compressor, especially if air isn't blowing through the evaporator in the dash.
Like madmatt2024 says, if it's not cycling, that's not a good thing....
Does the AC clutch engage when the AC knob is in the OFF position or turned to Vent or Floor?
Does the radiator fan come on when you turn the key on and the engine isn't running... (It shouldn't).
If you start the car cold, does the radiator fan come on then? It should run when you're in the AC position but it shouldn't when you're in the non AC positions.. Does the fan run when the engine is running but still cold cold and the knob is in the Off, Vent or Floor position.
It sounds a lot like there's a short circuit or crossed wires somewhere. What I'd do is get a schematic of the AC system and then trace back to see what is activating the AC clutch solenoid when it shouldn't be engaged..