[lolly23]

My ac stopped blowing air into the cabin, doesn't even blow hot air. I changed the resistor and it worked for a day then quit working. Can someone please help its 100 degrees outside and I'm burning up. 2001 f250 7.3

 

[Flounder_Pounder]

I would try a direct feed 12v to the fan motor and see what happens. The brushes on them only last so long.

 

[lolly23]

I would try a direct feed 12v to the fan motor and see what happens. The brushes on them only last so long.

Ok I tried doing that and the fan worked

 

[Oneof6]

Is there flow volume/pressure coming out anywhere, floor, dash or defrost position?

 

[Flounder_Pounder]

I would check the voltages & grounds at the resistor plug. You'll need a circuit diagram for your truck. Then work your way back from there.

 

[lolly23]

Is there flow volume/pressure coming out anywhere, floor, dash or defrost position?

No there is no flow from anywhere

 

[Oneof6]

If you're fan runs, there should be flow ..... somewhere, if the fan has an available supply and outlet media (air) path. However, if you have no vacume the in dash blend door doesn't work. Usually defaults to the defrost position. Do you hear the vacume pump when you " wait to start " KO?

 

[lolly23]

If you're fan runs, there should be flow ..... somewhere, if the fan has an available supply and outlet media (air) path. However, if you have no vacume the in dash blend door doesn't work. Usually defaults to the defrost position. Do you hear the vacume pump when you " wait to start " KO?

Fans are not blowing, I hear vacuum pump and I see the blend door move when I turn ac on/ off. Air came on randomly today when I was driving but now it’s not blowing.

 

[ArcticDriver]

Help me understand.

What does not work?

The A/C or the fan?