30.1 floor vents won't turn off

[Jnewsom76]

Some time over the night my RV decided to turn on the floor vents in the rig. I noticed it early in the morning and couldn't get it to turn off. I unplugged from my house, checked the thermostat to make sure it was off and it was still blowing air. The only way to turn it off was to turn off the battery connect.

Anyone else have this issue? Any suggestions on what i should check? I think my bus might be possessed.

-Socal Josh
Thor motor coach 30.1

[Travelin' Texans]

The furnace only blows from the floor vents & it's propane powered by 12volt from the batteries. Like most rvs the floor vents aren't closable due to too much heat build up if closed. If you had your thermostat set on "electric heat" that comes from the roof heat pumps & blows through ceiling vents, but once the inside temp drops 4-5 degrees below the set temperature the furnace fires up til it reaches the thermostat setting then the heat pump will start again. The heat pump will only work adequately until the outside temps reach about 40 degrees then they start blowing cold air & your furnace will start kicking on. Your coach is not possessed, but actually working as it should.

[Jnewsom76]

I've had the RV for about a month and it just started doing this. The overnight temps have been down to the low to mid 40's but thats it and I didn't notice blower being on. The outside temp was in the 50's when this was happening and I had the thermostat at its lowest setting of 55F. I will check it out today when I get off early. Temps are in the low 60's today.

Thanks for the input. happy holidays

-Josh.

[SuperD]

Check your thermostat and see if selector switch is set to fan only.

[dcarlyle]

If t-stat is off and fan still runs, check circuit board at furnace for water getting in.