Second question

[travism]

> I believe the fan motor in my rear AC has a problem and I'd like to
replace
> the motor. When I turn it on, it starts very slow and gradually builds up
> speed. (this of course is before the compressor kicks in) Sometimes the
unit
> will run nearly all day before kicking a breaker, and sometimes kicks it
> quicker. Since the unit cools fine when running, and considering the slow
> start up fan speed, I'm ready to gamble on a new motor. Can anyone give
me a
> source and perhaps a parts number?
> Justin

Most likely you can fix both problems by oiling the bushings in the fan
motor. The shaft coming from one end of the motor holds the fan that blows
the cool air inside the coach over the evaporator coils and the other end of
the shaft has the fan that blows outside air over the condenser coils. If
airflow over the condenser is too low, the condenser gets hot and head
pressure rises rapidly on the compressor. This causes the compressor to draw
too much current and trip the breaker.

Try some oil...

Travis

 

[travism]

> Try some oil...
>
> Travis
> >>
> Thanks Travis, I have, but didn't take the motor out. Perhaps I should
take
> it out where I can give it a good oiling.
> Justin

That may be what it takes, or it may be past help from oil. It is possible
to replace the bushings, but in most cases the entire motor gets replaced.
But your symptoms certainly sound like dry bushings.

Travis

 

[tim dawson]

I think that there is also a run capacitor on the fan motor on these units,
and if it were to degenerate, it may give the symptoms that you are seeing.
If you open the unit, and the fan motor turns freely, check the electrical box -
there are a few caps in there - definitely for the compressor, and I am pretty
sure for the fan motor also (sorry, I don't have the manual handy right now).

- - Tim

> I believe the fan motor in my rear AC has a problem and I'd like to replace
> the motor. When I turn it on, it starts very slow and gradually builds up
> speed. (this of course is before the compressor kicks in) Sometimes the unit
> will run nearly all day before kicking a breaker, and sometimes kicks it
> quicker. Since the unit cools fine when running, and considering the slow
> start up fan speed, I'm ready to gamble on a new motor. Can anyone give me a
> source and perhaps a parts number?
> Justin
>

- --
================================================================================
Tim Dawson (tadawson) Owner/Engineer
TPC Services Bellnet: (972)-221-7385
Lewisville, Texas 75067 FAXnet: (972)-221-0393
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