Have HVAC Questions? Ask an HVAC Expert for Answers
Your furnace has an electronic igniter(No pilot). Your furnace should have a control board in blower compartment.If furnace fails to light on call for heat e light should flash on board to indicate what failed.Look in blower and tell me if light flashes and if do pattern of flash.
When thermostat calls for heat, below is sequence it should follow.Let me know if it does any of this or if we get an error light on board
Steady light is normal.Does that change when thermostat calls for heat?
Issue may be in thermostat.Lets do this. Using needle nose pliers, or a short jumper wire ,jump R and W terminals on funace board where thermostat wires connect. Push in that door switch and see if furnace will work.
3 flashes is an open pressure switch.Does the small vent motor come on?
Ok that is your problem That is the inducer motor.It has to come on and pull a vacuum on the pressure switch, Turn it by hand and see if it spins freely and if it will start with a bit of assistance spinning it.
If it spins freely by hand but will not start the motor I going to have to be replaced.
You will need a new induced draft motor.
I would definitely have it checked. Could be as simple as low batteries if it uses batteries.
6 flashes is a rollout switch. Should not come into play until furnace has lit. You can try to reset them by pushing button in center of each switch