How To Turn On Furnace Without Thermostat. The blower can also be used without the furnace burner’s ignited. By turning the thermostat down and then back up you are resetting the control board.
Set the thermostat to heat and the fan to auto. If it works you will have to turn off breaker to shut it down. Opening my thermostat and doing some tests i got these values bellow:
I will need more information to help you get to the problem.
I would like to create a solution (probably with arduino) to control my ac remotelly. The air in your home is first sucked into the furnace through a blower fan. Wait for the furnace to stop its heating cycle. Turn the power on to the hvac at the circuit breaker.