Furnace Power Switch?

Stu Rasmussen

Stu Rasmussen

New member
Jan 29, 2019
132
0
0
Greetings all,

I can't figure out how to get the furnace to light off in my '77 Birchaven.

Propane turned on, turning the thermostat up until it clicks and nothing happens.

From other furnace traffic on the forum it seems that at least the furnace blower should come on when the 'stat is calling for heat but no joy here.

Is there a 'main switch' for the furnace (to cut its 12V power off when the coach is parked and idle) that I am missing?

All other 12V living area equipment (lights, water pump, fans, etc.) is working fine.

Thanks in advance,

stu
--
Stu Rasmussen W7QJ
Silverton, OR
gutted '74 Eleganza II (for sale now)
'77 Birchaven
 
What is the make and model of your furnace?

Emery Stora

>
> Greetings all,
>
> I can't figure out how to get the furnace to light off in my '77 Birchaven.
>
> Propane turned on, turning the thermostat up until it clicks and nothing happens.
>
> From other furnace traffic on the forum it seems that at least the furnace blower should come on when the 'stat is calling for heat but no joy here.
>
> Is there a 'main switch' for the furnace (to cut its 12V power off when the coach is parked and idle) that I am missing?
>
> All other 12V living area equipment (lights, water pump, fans, etc.) is working fine.
>
> Thanks in advance,
>
> stu
> --
> Stu Rasmussen W7QJ
> Silverton, OR
> gutted '74 Eleganza II (for sale now)
> '77 Birchaven
>
 
Sir: There should be a 12v fuse in the panel that might look good but have a dirty or loose connection, and there should be a reset button on the
furnace itself. In our Crestmont it is on the side close to where the power supply and thermostat wires are.

> Greetings all,
>
> I can't figure out how to get the furnace to light off in my '77 Birchaven.
>
> Propane turned on, turning the thermostat up until it clicks and nothing happens.
>
> From other furnace traffic on the forum it seems that at least the furnace blower should come on when the 'stat is calling for heat but no joy
> here.
>
> Is there a 'main switch' for the furnace (to cut its 12V power off when the coach is parked and idle) that I am missing?
>
> All other 12V living area equipment (lights, water pump, fans, etc.) is working fine.
>
> Thanks in advance,
>
> stu

--
C. Boyd
76 Crestmont
East Tennessee
 
As Chuck Boyd said check connections and also it requires at least 14 volts
at times to get thing going.
I usually give the unit a good slap on the side to loosen things . It works
more than you know.

On Fri, Jul 12, 2019 at 8:22 AM Charles Boyd via Gmclist <

> Sir: There should be a 12v fuse in the panel that might look good but
> have a dirty or loose connection, and there should be a reset button on the
> furnace itself. In our Crestmont it is on the side close to where the
> power supply and thermostat wires are.
>
>
>
>
>
>
>
>

> > Greetings all,
> >
> > I can't figure out how to get the furnace to light off in my '77
> Birchaven.
> >
> > Propane turned on, turning the thermostat up until it clicks and nothing
> happens.
> >
> > From other furnace traffic on the forum it seems that at least the
> furnace blower should come on when the 'stat is calling for heat but no joy
> > here.
> >
> > Is there a 'main switch' for the furnace (to cut its 12V power off when
> the coach is parked and idle) that I am missing?
> >
> > All other 12V living area equipment (lights, water pump, fans, etc.) is
> working fine.
> >
> > Thanks in advance,
> >
> > stu
>
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
OK, y'all pointed me in the right direction and the problem is solved!

Thermostat contacts were a bit corroded and didn't make good enough contact to pull in the furnace fan relay.

And, for my future reference, when the thermostat is at its lowest setting it stays completely open regardless of how low the temperature goes, so
that is the 'shutoff' switch.

Thanks again!

Stu
--
Stu Rasmussen W7QJ
Silverton, OR
gutted '74 Eleganza II (for sale now)
'77 Birchaven
 
On my furnace (Suburban) there's a rocker switch on the lower right side in the opening there, almost impossible to get to. You can switch it by
reaching yuour hand flat beside the furnace. It turns the 12 volts to the furnace off and on. I had the corrosion problem on the thermostat as well,
I simply replace the 'stat.

--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
 
I have seen the switch on the Suburban units.
We turn it on before installation. I'll ask the rep why they do that other
than as a protection of the board during hookup.

On Sun, Jul 14, 2019 at 8:52 AM Johnny Bridges via Gmclist <

> On my furnace (Suburban) there's a rocker switch on the lower right side
> in the opening there, almost impossible to get to. You can switch it by
> reaching yuour hand flat beside the furnace. It turns the 12 volts to the
> furnace off and on. I had the corrosion problem on the thermostat as well,
> I simply replace the 'stat.
>
> --johnny
> --
> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> I forgive them all, save those who hurt the dogs. They must answer to me
> in hell
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
How's to tell the rep to put the damn switch where you can see it and reach it. I turn mine off in the spring and back on in the winter. A colossal
PIA.

--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
 
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