heat while driving

[Dick]

Check the dash for a switch labelled 'front heat'. That switch will cycle 12V
power to the 'Sporlan Valve' which in turn will allow engine coolant to flow
through the front heater. If you have good hearing, you will be able to hear
the Sporlan cycling on and off as the front heat switch is repositioned. You
should also feel the Sporlan internal mechanism move when the front heat switch
is cycled. A helper will make it easier to check for sounds and Sporan
movement.

Sporlan valves are easily cleaned if flow is not achieved.

Dick Gideon
1989 FC35
Rolla, MO


--- In WanderlodgeForum@yahoogroups.com, "freewill2008" wrote:
>
> Here is some general trouble shooting information. PT owners may know some
tricks specific to your rig:
>
> The fans blow cold because the heater core is cold. Are there other chassis
heaters (not propane furnaces) around the bus that blow warm? If so, then your
hot water circulation is working.
>
> There is probably a Sporlan valve controlling hot water flow to the front
heater cores. The valve is controlled by a a 12 volt circuit. That circuit
inlcudes the 12 volt source power (fuse? breaker?) and one or more switches.
One switch is probably a manual control somewhere on the dash. There may also
be a thermostat (temperature controlled switch) somewhere in the dash.
>
> Other possibilities: 1. The front heat Sporlan valve gets power, but the
valve is plugged or broken. 2. There is a summer/winter valve (manual or
Sporlan) that is shut off. 3. The front heater core is plugged.
>
> Bob Griesel '84 FC31 WLII WA
>
> --- In WanderlodgeForum@yahoogroups.com, Jana Ewart wrote:
> >
> > We are finally on the road "full-time" as of this morning. It is
> > cooooollllldddd up here in the north. Can anyone give us some ideas how to
> > get dash heat while going down the road? We have the right vent and left
> > vent closed, the front heat under the camera is all the way to heat -- but
> > the right and left fan switches only blow cold air. Is there another button
> > or switch we need to turn on? Thanks so much.
> > Jana (with ice cube feet)
> > 89pt40wb
> > The Bird House is on the road!
> > Still in South Dakota
> >
> > --
> > Blessed are the people whose God is the Lord. (Psalm 144:15)
> >
>