PT Engine Cooling Fan System

[ronmarabito2002]

Rick:

There is an alarmstat on the rear of the engine that
senses water temperature. When it reaches the correct temperature, it signals
the fan to go into high speed. I don't know all the interlocking parts, but
that typically is how it works. A failed alarmstat will keep your fan on high
all the time. Also, when you turn on the dash air, it signals the fan to run in
high mode.

R.E. (Ron) Marabito, Dallas, TX 92WB40


--- In WanderlodgeForum@yahoogroups.com, "Rick A." wrote:
>
> Has anyone figured out how the PT engine cooling fan system actually
changes from low
> speed to high? Obviously there is a fan override switch on the dash and a
temperature
> controlled switch on the engine which when activated turns the fan on high.
Question is,
> what do they really turn on? or off?
>
> thanks,
> Rick Archie
> 85PT40
> Fort Worth
>