ac quit, 99 explorer 5.0

[wddanie]

The ac quit on my 99 Explorer yesterday. It has a 5.0. I think it might be electrical since I do not here any clicking of the ac clutch when I turn the ac on and off.

This is the 1st time I looked at the ac. I see a disk extending fwd of the comp, and it remains fwd of the ac comp pulley with ~.25 in gap, even with the ac on or off. I suspect this is the clutch, and it quit pulling in for some reason.

The ac was running fine and full tilt while I was driving, then the air just started getting hot while blowing over a 3 minute period. A quit failure like that sounds electrical vs mech to me.

Any good trouble shooting tips for me to start with?

Can someone tell me which fuse I should check? I do not have an owners manual. I plan to by a shop manual today at Autozone, but wanted to get a head start if some of you could help.

Thanks in advance for your help.

Doug Danielson

 

[AR123]

It sounds like it may be the pressure switch. I had one go bad on a GMC truck, and same thing, no air. I took and jumpered the switch and it worked fine. That is how I knew it was the pressure switch. I think it is on the high pressure side and will have a 2 pronged electrical connection, jumper these 2 prongs(In the electrical plug) and see if the compressor cycles. If it does, you found your problem! Let me know what you find out.

 

[Glacier991]

He's referring to the low pressure cutout. Jumpering it will make the compressor run if a) the switch was bad, of if, b) you have a low charge due to a leak. If a) he's right. if b) he isn't. You need a gauge set to check pressures to know.

Cool Exploring

Chris