Fan blower only works on high speed....
I have the Itasca detailed below, and lately has developed an issue where the dash fan will only work on the high (noisy!) switch setting. After starting the engine (Chevy workhorse 8.1 engine chassis...
Forum Discussion
murraymcleod wrote:
OK, but why are resistors in the airflow pathway? Are they acting like thermistors for temp regulation? Or is this too keep the resistors cool so they don't fail? But this wouldn't seem to work if he heater was blowing hot air!
It is to cool them. Even heater hot air will drop the temp a lot. They get hot enough to boil spit.
