Does thermostat in bedroom 3711FL control the furnace

[Ronaldg]

Problem: the bedroom thermostat does not turn on the furnace.

What i have done.

I have 2 thermostats. One in upper living room
One in bedroom
the one in the living room by the door when in furnace mode turns on the heat.
I feel heat in the living room and some in the bedroom.

But if the one by the living room is OFF.
and i try to turn on the heat with the one in the bedroom the furnace never comes on. Ever (is that broken?)

If i switch the bedroom thermostat to air the air cond comes on fine.
yes i know it controls the back air cond
but since there is only one furnace. I wondered if the one in the bedroom is supposed to turn it on.

I had someone come to my rv to try to fix it but he said he thought the back thermostat did not did not control the furnace ON or off.
Any help would be appreciated.

I guess i am wondering if this is broken or my brain is broken. I don't know much about rv heating.

thanks for anyone who replies.