In a similar vein, my temp control does not work. Switching to A/C will give coolish air, but otherwise, my temp is fixed regardless of dial position. I will be searching around here for possible answers, but thought I would give a quick ask when I saw this.
I just fixed that one myself go to the website heatertreater. That part goes into the actuator. I did not calibrate it as the directions said. But I put the new piece in and the dial works.