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denis007's avatar
denis007
Explorer
Apr 08, 2016

Built in Propane Heater thermostat not functioning

Good morning everyone, hope you're all anxious to hit the roads this summer ! I've got a problem with the built in heater in my old 1980 Holiday 20' travel trailer. It's just a "hot box", not a for...
denis007's avatar
denis007
Explorer
Apr 11, 2016
SprinklerMan wrote:
Looks like a thermo coupler . On a home hot water heater or furnace the flame heats it . Its function is to keep the gas valve open .If it becomes cold it will shut off the gas valve . Its usually kept hot by a pilot light .


The thermocouple is on the pilot light, this is external to the furnace. In an old manual I found online they call it a "Sensing Bulb", and it's to be mounted horizontal below the furnace grille.

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