Originally Posted by wahoonc
Yes... typically they will come one around 35°f.
It might sound obvious but are you on shore power? If you are, the power converter will supply the heater and you will not see any current draw from the battery.
I recommend you dont run them if the tanks are empty, i have heard there is a risk of melting the tanks. I would think there is protection against overheating but i would not trust it to be on safe side.
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