The heated drivers seat in our 03 mountaineer doesn't work. The button works and the little light in the dash lights up but the seat doesn't ever warm up. I don't have any idea of where to start looking for the cause and wondered if anyone here might have an idea. Thanks in advance for any help.

 

When I bought my 2004 Mountaineer the driver's heated seat didn't work but the indicator on the climate control system indicated it was receiving power. After reviewing the wiring diagrams I checked the connection between the seat bottom and seat back heaters and determined I had resistance through the seat back heater element but not the bottom heating element. I disassembled the seat and found the open in the heater element. I was able to tear a bit of the heater element fabric and solder the two ends of the broken wire together and it's been working great since then (1.5 years now). It wasn't a simple task to disassemble the seat cushion but it was well worth it to have a working heated seat!

-Rod