furnace
I have a duo therm furnace in my trailer that will work perfectly fine on either shore power or generator but will not fire on battery's have checked battery voltage and they are at 13.78v. the fan wi...
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Also check that there is no dirt buildup on the sail switch blade. I've seen a few with just enough cooking grease/dirt buildup that the extra volt or so from the converter was needed to run the fan fast enough to trip it. The battery voltage alone wasn't enough.
