Rear bedroom thermostat controls the propane furnace. On off switch is underneath, and slide temperature control is on top. Check your manual and information on the furnace cover, procedure to use furnace is 1. Have 12v
power available, 2. Have propane hooked up, 3. Purge propane lines by lighting a burner on the stove, 4. Move switch on the bottom of the thermostat to on, 5. Move slide control on top to a position warmer than the current interior temperature of the AS. Within about a minute your furnace should kick on.