| Furnace Power Switch? [message #345173] |
Fri, 12 July 2019 09:50  |
Stu Rasmussen
Messages: 130
Registered: January 2019
Location: Silverton, OR
Karma: 0
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Senior Member |
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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
'77 Birchaven
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| Re: [GMCnet] Furnace Power Switch? [message #345174 is a reply to message #345173] |
Fri, 12 July 2019 10:05  |
Emery Stora
Messages: 959
Registered: January 2011
Karma: 4
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Senior Member |
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What is the make and model of your furnace?
Emery Stora
> On Jul 12, 2019, at 8:50 AM, Stu Rasmussen via Gmclist wrote:
>
> 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
>
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| Re: Furnace Power Switch? [message #345175 is a reply to message #345173] |
Fri, 12 July 2019 10:12 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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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.
Stu Rasmussen wrote on Fri, 12 July 2019 10:50Greetings 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
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| Re: [GMCnet] Furnace Power Switch? [message #345181 is a reply to message #345175] |
Fri, 12 July 2019 11:20 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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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 <
gmclist@list.gmcnet.org> wrote:
> 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.
>
>
>
>
>
>
>
>
> Stu Rasmussen wrote on Fri, 12 July 2019 10:50
>> 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
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Furnace Power Switch? [message #345189 is a reply to message #345173] |
Fri, 12 July 2019 13:07 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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The switch on most is at the thermostat. There are a couple fuses and a reset on some.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Furnace Power Switch? [message #345193 is a reply to message #345173] |
Fri, 12 July 2019 15:02 |
Stu Rasmussen
Messages: 130
Registered: January 2019
Location: Silverton, OR
Karma: 0
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Senior Member |
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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
'77 Birchaven
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| Re: Furnace Power Switch? [message #345258 is a reply to message #345173] |
Sun, 14 July 2019 10:33 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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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
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| Re: [GMCnet] Furnace Power Switch? [message #345278 is a reply to message #345258] |
Sun, 14 July 2019 13:59 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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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 <
gmclist@list.gmcnet.org> wrote:
> 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:
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>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Furnace Power Switch? [message #345282 is a reply to message #345173] |
Sun, 14 July 2019 14:35 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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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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