I have fan, cool, furnace, heat pump, and on and off as selections on the control. Had furnace selected. Hope this helps. No there is no way to get to the front of the furnace without unscrewing the cover.
I am wondering if the wiring in the Thermostat/controller is somehow screwed up?
SFC USA RETIRED
2014 FJ Cruiser
2014 T12 DDST
Its Cute but......
Total 87(2014) 58(2015) 72(2016)