Dealer replaced my a/c controller about a year ago b/c the blower fan will shut off.

The problem is starting again. Saturday it shut off for a long time and I had to turn truck off and back on to get blower to work. Most of the time it shuts off for a few seconds and kicks back on.

Think it could be a bad fuse or relay for the blower?

 

Sounds like the blower motor may be drawing too much amperage after it runs for a while then resets after it cools, or it could be a circuit breaker. I had the same type problem with headlights. After replacing numerous wires and connections it turned out to be a weak circuit breaker that popped to easily and then reset. Replaced the curcuit breaker and no problem since (4 years).

 

Next time it happens try turning the light switch on and off. If that corrects the problem the control head is probably going out again.

 

Mine did the same thing. A/C was still engaged but the fan would quit,replaced the control but, no fix, finally R&R the blower relay behind the glove box.

 

Had the same problem. I think it is probably a relay. As soon as you reset the system by turning the truck on and off the blower returns.