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Old 01-08-2021, 02:33 PM   #1
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Default Furnace Rarely Works on 120VAC

My furnace works great on my 2015 242 BDS when I am on battery, however it doesn't want to start up when I am plugged into 120 volts. Any ideas folks? Thank you.
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Old 01-09-2021, 12:27 AM   #2
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There's something else at play here because the furnace runs on 12v. (And propane).
So somerhing to do with your ac/dc converter?
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Old 01-09-2021, 09:53 AM   #3
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Must be something else like Rick says. Power converter ?
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Old 01-09-2021, 08:33 PM   #4
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Default What type of thermostat?

Suspect it's something like this (I found it on another site, better than I could explain, so I'll use their words.)
Are you switching the switch on the thermostat ON to heat and raising the temp to make the heater come on OR are you switching the other switch, on the thermostat, to FAN ?

The fan setting on the thermostat is for the air conditioner fan and will not work on battery.

The heater had its own seperate fan motor inside it. Switch to HEAT on the thermostat, turn the temp up above the room temp and wait for the heat to come on.
If you have a Dometic Control for the Furnace/AC, here is another piece of info to tuck away.
When you are plugged into shore power and want to run the furnace Without having the AC/Heat Pump Fan come on you need to set the Fan to Auto on the control. Otherwise when the furnace cuts in the AC fan will come on also and blow cool air.
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