Main vent fan in center of coach

[Pete Masterson]

Leroy,

Yes ... the Kool-matic fan. That's the one I'm talking about.
(Couldn't remember the name earlier.)

It sounds like the fan simply runs ... no starts and stops, right?
Mine will run for a while, then quits for a few seconds and then run
for awhile... I suspect a 12 v circuit breaker that's tripping then
resetting itself. The thermostat is _not_ the problem. I've switched
the fan on with the heat/off/cool set to off and the auto/on set to
on ... runs... stops... runs ... stops... runs. Same with heat/off/
cool set to cool (auto/on set to auto). Runs ... stops... runs...
stops... etc. ... I've had the cover off the thermostat and the
thermocouple (the coiled spring thing) does NOT move when the fan
cycles on/off (although I can get the thermostat to cycle the fan off
by moving the temperature setting above the ambient temperature).

I'm assuming a faulty circuit breaker, of course, the fan motor
itself may be drawing too much current, causing the breaker to
trip... either case, I can't put a tester on it (conveniently) with
out knowing which breaker and what value to be checking...

So, my question really is, where is the circuit breaker that services
the fan? I've got dozens of pages of wiring diagrams that often
provide little useful information (or information so encoded as to be
near-impossible to decode). So far, I've found description of many of
the fuses in the front compartment and those in the back closet ...
but many others of the fuses in both locations aren't described. The
descriptions up front are almost all related to vehicle functions...
but "house" functions aren't described. (Likewise the rear panel in
the back closet.)

<sigh> This is soooo frustrating sometimes.

Pete Masterson
'95 Blue Bird Wanderlodge WBDA 42
aeonix1@...
On the road at Lockhart, Texas



On May 14, 2007, at 3:15 PM, Leroy Eckert wrote:

>
> Pete:
> Mine operates in a similar fashion. My fan is 12v Kool Matic
> RV-12. With the heat/cool side set to off, the fan operates when
> the auto/fan side is switched to on. In auto and cool selected the
> fan operates if the thermostat lever is moved below air
> temperature. In the on position it will run until it is turned
> off. Presumably, in the auto position it will run until
> themperatures drop( I am not certain) I was finalizing my side
> camera install today and tried it out. It stayed on in the auto
> position the whole time I was working.
> It does not run on heat/auto.
> I have always used it with the heat/cool off and fan on. Didn't
> know it would operate the other way until now.
>
> Leroy Eckert
> 1990 WB-40 "Smoke N Mirrors"
> Niceville, FL