Thank you all for the comments. I will check the the hole behind the thermostat. The heat pump worked okay last night, but it's supposed to be colder tonight, so I'll try furnace again tonight. It was cold in here when I initially turned it on, so I'll let it cycle a few more times and see if it works better when the air equalizes.
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Robert and Heidi
2017 Montana 3160rl
2006 Ram 2500
5.9 Cummins Turbo Diesel
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