Thermostate Setting for Failing Squarrel Fan

[Scott Forman]

Looks like this is my culprit. Where can a get a replacement
thermostat?

Scott

--- In WanderlodgeForum@yahoogroups.com, "Howard O. Truitt"
wrote:
>
> Scott,
> Pull the thermostat and check the voltage going to the thermostat.
May need a new thermostat.
> Howard T., Sowega, 86 PT40, 8V92
>
>
> ----- Original Message -----
> From: Scott Forman
> To: WanderlodgeForum@yahoogroups.com
> Sent: Monday, August 20, 2007 12:57 PM
> Subject: [WanderlodgeForum] Re: Thermostate Setting for Failing
Squarrel Fan
>
>
> OK...still fighting this project, need some suggestions.
>
> Everything is mounted and installed, but I cannot get the fan to
> engage from the original thermostat. When I apply a flame to the
> thermostat, I can hear it click and a small voltage begins
flowing to
> the original squirrel-cage wire. The problem, though, is that the
> voltage at that wire is very weak, varying from less than 1 volt
to
> around 5. I cannot identify anything that makes the voltage
change.
> This voltage is not enough to close the relay and turn the fan
on.
>
> Any suggestions as to what is causing the voltage to be low or
how to
> fix it? I guess this may be the reason the original fan quit
working
> in the first place.
>
> Scott
>
> --- In WanderlodgeForum@yahoogroups.com, "Howard O. Truitt"
> wrote:
> >
> > Scott,
> > That would be a safe assumption.
> > Howard T, Sowega, 86 PT40
> >
> > ----- Original Message -----
> > From: Scott Forman
> > To: WanderlodgeForum@yahoogroups.com
> > Sent: Saturday, August 18, 2007 3:36 PM
> > Subject: [WanderlodgeForum] Re: Thermostate Setting for Failing
> Squarrel Fan
> >
> >
> > There are two wires going to my original fan, green & yellow.
Is
> it
> > safe to assume green is ground and yellow is hot?
> >
> > Thanks
> > 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
> > > > > >
> > > > >
> > > >
> > >
> >
> >
> >
> >
> >
> >
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Date:
> 8/15/2007 4:55 PM
> >
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> >
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>
>
>
>
>
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8/15/2007 4:55 PM
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