Originally Posted by Melvin
My heater only works on high. Any ideas why?
Sounds like mine. I stopped by Auto Zone on the way home from work yesterday and picked up a replacement resistor for $19.99 (lifetime warranty). After diner, I replaced it, and she works on all speeds now!
The stock one I removed was visibly damaged from moisture, as you could see corrosion on the circuit board.
I used this YouTube video (actually 3 videos) to give me an idea what to do. Easy job, tight space. Good luck.