94 AC problem

[Milio Marsh]

When I go and turn on the AC it blows hot air instead of cold air. The compreser pump doesn't angage as it should. Can it be a blown fuse? If so, what fuse am I looking for? The truck is a 1994 Explorer XLT.
Thanks for your help. I can't take it any more without the AC.

 

[Glacier991]

I'm moving this to the AC forum. The threads there and the other sticky threads will help answer your question.

 

[Glacier991]

If the system is low on refrigerant, there is a low pressure cutout switch that will prevent the compressor from operating ... why? Because the lubrication is carried in the refrigerant and no refrigerant = no lubrication = burned up compressor in short order. You probably just have a low charge.