1997 F150 XLT 4.6L.

My a/c runs whenever I select any heat setting. Just had a radiator flush and fill, t'stat replaced. Any idea what the problem could be and what is the skill level needed to repair.

Thanks

 

The A/C is set to run automatically on Fords it is not a problem. all the A/C does is put out dry heat to defrost better and dry the air out. when you put the selsctor on floor or defrost and put it on max heat does it come out hot, if so you are good to go.

Lance

 

No, the air comes out ice cold.

 

sounds like the shop that did the t-stat and flush could of not furged all the air out of the coolant system causing it to be air locked.thats where i would start first.

 

a quick question are you sure the therostat switch is working and when you turn it to hot is actually turning to hot?? something to check.

Lance

 

I did take the t'stat switch apart to look at but didn't do a continunity check, I'll give it a shot.