Furnace Problem

[Coug60]

New Montana owner here. 2019 3121RL. So, I took my 2019 Montana out for elk season and my furnace went psycho on me. My furnace is a Dometic. That’s what’s on the Thermostat
Situation:
1. Turn furnace on at Kitchen thermostat
2. Fan starts
3. Burner kicks on 2 sec kicks off 5-10 seconds
4. Burner kicks on 5 sec kicks off 5-10 seconds
5. Burner kicks on 2 sec kicks off 5-10 seconds
6. Burner kicks on 10 sec kicks off 5-10 seconds
7. Burner kicks on 25-30 sec kicks off 5-10 seconds
8. Fan never stops, and furnace never shuts down until I turn it off.

#3 thru #7 happen in no particular order and times you can vary 5 to 15 seconds... seldom the longer.

I have two thermostats, one in the bedroom and one in the kitchen area. None of them are located next to a vent. I’ve been using the kitchen thermostat so turned the system off and then tried using the bedroom thermostat just to see what would happen. Bedroom thermostat although is powered will not activate the furnace.

Any ideas?