As the title says, my 2013 F-150 XLT lost all heater function and rear window/side mirror defrost function. It all worked fine this morning on the way to work but when I got out I had nothing. Looked at fuses under the hood, nothing is blown. Could it be a relay? The led lights in the buttons on the module still light up and I can hear the vent doors open and close when I change modes.

 

Don't know about the defrost and mirrors but I had a resistor changed today (warranty) that kept the blower from working on 1 and 2. The dealer said if I had waited 3 and 4 would probably have gone out too.

 

Thankfully the truck is still under warranty. Will be going to the dealer tomorrow morning.

 

Sorry to hear that...hope they get it resolved for you quickly

 

Let me know how your trip to the dealership goes, TheBestNeverRest. Feel free to PM me if you need any help; all I'll need to get started is your full name, best daytime phone number, VIN, mileage, and servicing dealer info.

Crystal

 

Well, it's working again. Apparently it started working again right after they took it into the garage. May have been a little moisture that got in somewhere and froze up. It was quite cold yesterday.