The furnace runs ONLY on 12v battery power.
Shore power only keeps the batteries recharged.
If you plan on doing this often, you need a two battery setup at minimum.
The furnace is the biggest battery power consumer in your trailer.
It can drain a single battery in one night.
When you turn the thermostat to Heat, there's usually a delay.
Is the battery installed or is there a battery disconnect switch?
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC