Sail switch in 1976 Duo-Therm how to?
I have a older 1976 GMC class C 23' motorhome than is quite sound and runs great with 54k on it. There have been a few modifications to the propane tank (removed and using detachable 20 LB tanks) The ...
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If you really want to tear into the furnace.......
Here is a service manual for older Duo-Therm Furnaces......LINK
BUT
If it works on shore power......then it will work on battery IF your battery is any good.
Same wiring goes to furnace......either converter supplies the necessary 12V DC power or the battery does.
Get your battery system fixed.
Either your converter (charger section) is not fully charging battery
AND/OR
your battery is not able to hold a good charge and voltage drops off quickly.
You should be able to run furnace all night on just battery power.
Here is a service manual for older Duo-Therm Furnaces......LINK
BUT
If it works on shore power......then it will work on battery IF your battery is any good.
Same wiring goes to furnace......either converter supplies the necessary 12V DC power or the battery does.
Get your battery system fixed.
Either your converter (charger section) is not fully charging battery
AND/OR
your battery is not able to hold a good charge and voltage drops off quickly.
You should be able to run furnace all night on just battery power.
