Currently on a work-cation at bro's house at Grand Lake OK....heater and all working great.....then late yesterday, heater just quit working....no noise, fan....ner nuttin.
Heat set at 68, inside temp is 61.....heat mode.....nuttin.
Yes, we have propane in the tanks....feels/sounds like a dead system.....no breaker swith is labeled furnace....all breakers in correct position......going to be 28 tonight.....anyone have a suggestion on what I may look at?
I don't even know how to/where to access heater.

We are leaving in the morning for home....i have dealer called...i called GD......no help.

Thanks