Originally Posted by Mr. Dan
This gets reported about 5-8 times per month. Some call this operation a feature.
To stop it, cycle your thermostat from Cool through Heat to Fan. Then use the + or - keys to cycle fan speed from HI through LO to AU for (Auto).
I'd be one of those 'some'.
People come on here pretty much weekly saying they have a problem with their furnace or their air conditioning because the A/C fans runs when they turn the furnace on, when in fact, they do not have a problem.
The system was engineered and manufactured to operate in this manner to help distribute the warm air (warm air rises) throughout the R/V.
The end user has the option to either use it in this mode or turn it off. It is all explained in the manual for the thermostat.
If an item has more than one mode of operation... and that option is working as designed... I'd call that a feature.
I hope the OP gets the thermostat into whatever mode best suits them.