On our 3791RD I've noticed that both thermostats have a heat pump setting. Where we are currently and in our driveway at home, the outside temps are too cold and the humidity is too high to get much from a heat pump. For the best from a heat pump, the air should be dry and not colder than ~45F.
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2018 Montana 3791RD (SOLD)
2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600 (SOLD)
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