Question A/C Not Working on 2001 F250 PSD

[cpadolf3]

Sorry to post this on the power/performance thread. Not sure where else to put it. Yesterday, I left my truck running for about 5 minutes while I was doing something in the house. The AC had been working all day, and I had it on Max/Cold. I came back out and noticed it felt warm. Placed my hand in front of the vent and realized it wasn't blowing at all. Moved the switch around a bit, even tried heat. Nothing. No air will flow out of the vents, regardless of what I do. What could this be?

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[79jasper]

Well usually you can start with checking the fuses.
Next highly likely culprit would be the blower motor resistor.

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[cpadolf3]

Do you know which fuse it is?

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[79jasper]

Couldn't tell you.
Look in the owners manual if you have it.

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[DaveBen]

Probably fuse 20 or fuse 21. These are switched from the ignition as the AC only works when the truck is running.

 

[DaveBen]

Here is my fuse information; http://circuitswiring.com/2001-ford-f250-fuse-box-diagram-2/

 

[cpadolf3]

Thank you very much! All fuses appear to be good. Should I move to the resistor at the fan motor itself?

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[DaveBen]

I would just connect the fan to 12v and see if the fan works or not.

 

[cpadolf3]

Wouldn't I need a specialty wire harness?

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[DaveBen]

I would use test wires with an alligator clip on each end. It is just to test it and see if it runs or not.