Thermostat Says Heat On But Furnace Not Running - Web a recap of why the thermostat says heat on but no heat comes from the furnace and what to do. When your thermostat displays “heat on” but doesn’t produce. Furnace won’t turn on because of a switch or. Verify that the thermostat is set to heat and is calling for heat, usually indicated by the words heat on, a flame.
Verify that the thermostat is set to heat and is calling for heat, usually indicated by the words heat on, a flame. Furnace won’t turn on because of a switch or. When your thermostat displays “heat on” but doesn’t produce. Web a recap of why the thermostat says heat on but no heat comes from the furnace and what to do.