Thermostate Setting for Failing Squarrel Fan

[Scott Forman]

One more question...by using a 12v source for the relay from the
charger compartment, the juice will not be cut off by the master
switch under the dash. What's the word on the possibility of the
thermostat malfunctioning and causing the fan to run continuously &
kill the batts?

Scott

--- In WanderlodgeForum@yahoogroups.com, "sfedeli3" <sfedeli3@...>
wrote:
>
> Scott,
> Use the 12V + wire going to the squirrel cage fan as a "trigger"
for
> a Bosch style relay. You will want to supply the main voltage to the
> fan directly from a 12V source in your charger/Rediline compartment.
> The fan will draw better than 12 amps, which would burn out the
> thermostat contacts over time if you don't use the relay. Be sure to
> also use 10 or 12 ga. wire for the fan. The trigger wire from the
> squirrel cage can be lighter size since it does not carry much of a
load.
> I located the Bosch relay in the charger compartment and ran the
> wires from the squirrel cage and to the fan through a 1/2" hole in
the
> compartment wall. Make sure to use a grommet to prevent chafing and
> try to enclose all of the wires in wire loom or some sort of
conduit.
> If you are not familiar with how to wire the relay, this is a great
> project for learning- there are numerous links floating around the
web
> with instructions. Also be sure to install a 20 A fuse between the
12V
> source and the relay.
>
> Shane Fedeli
> 85PT40
> Hershey, PA
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Scott Forman" <sforman@>
> wrote:
> >
> > Can someone explain how to run the wires for this set up?
> >
> > Scott Forman
> > 86 PT38
> > Memphis
> >
> > --- In WanderlodgeForum@yahoogroups.com, "sfedeli3" <sfedeli3@>
> > wrote:
> > >
> > > Hi Curt,
> > >
> > > My thermostat is mounted in the ceiling of the engine
compartment
> > > just above the alternator on my 6V92. It is about the size of a
> > small
> > > bottle cap. I used it, in conjuction with a bosch relay, to
power a
> > > Hayden fan that cools the engine compartment. I used the
largest fan
> > > that I could find at Advanced Auto parts and mounted the fan
behind
> > > the grill that provides access to the curbside of the engine
> > compartment.
> > > Originally, I had set my fan to expel the hot air and work in
> > > tandem with the large engine fan to pass air through the
> > compartment.
> > > Once parked, however, I have achieved better results by drawing
> > cool,
> > > outside air into the engine compartment, expelling it through
the
> > > radiator. I usually just reverse the wires on the fan, causing
it to
> > > run backwards. This would cool the compartment so fast, that
the
> > relay
> > > would shut it off, so I also installed a SPDT switch to
override the
> > > thermostat and leave the fan on. I may eventually install at
DPDT
> > > switch to reverse the polarity without having to pull the wires
off
> > > the fan. This setup has worked fine for about 12K miles and the
fan
> > > does not seem to mind running in reverse.
> > >
> > > Shane Fedeli
> > > 85PT40
> > > Hershey, PA
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "Curt Sprenger"
> > > wrote:
> > > >
> > > > Several of us have recently posted about the ratteling or non
> > working
> > > > fan that is mounted in the upper rear area of the engine
> > compartment.
> > > > Does anyone know the thermostat degree setting for that fan?
> > Anyone
> > > > know where that thermostate is located?
> > > >
> > > > My thought at this time is to control the add-in Hayden fans
to
> > run
> > > > off the same controls.
> > > > --
> > > > Curt Sprenger
> > > > 1987 PT38 8V92 "MacAttack Racing"
> > > > Anaheim Hills, CA
> > > >
> > >
> >
>