National RV Heat Pump Issue

[Spokane Mike]

Have a 2007 Dolphin. Have been using my 2 ton basement heat pump to provide electric heat while plugged in. However, every morning while the thermostat is still on electric heat, it will - on it's own - fire the gas furnace. Gas furnace heats up, hitting desired temp and then turns off. I have to manually switch the setting to off then back to electric to get it to reset and go back to electric heat. Until the next morning. Has anyone had this same experience? Just trying to figure out if this is normal operation or if there is a problem brewing.
Thanks in advance.

[Martind4]

We had basement air in a previous coach and the same thing would happen if the outside temperature was below 35 degrees or so.

The heat pump just wasn't efficient enough to extract heat from low outside temperatures and the gas furnace would kick in to make up the difference.

[shootist]

Heat pumps are efficient down to 40 degrees, colder than that you are better off on your furnace.