Lennox Gas Furnace: G23 Re: Inducer Motor Not Running The furnace is receiving a call for heat, but the inducer motor is not running and ignition never takes place. Qty Possible Causes: 1 Motor Needs Oiled Bad Inducer Motor Item Stuck in Vent Blower ...

Lennox Gas Furnace: G23Q4/5 Re: No Heat / Won't Ignite This furnace uses a spark ignition control and electronic ignition (3-wire) gas valve. When the ignition control receives 24VAC on "TH" or "2" it should start sparking through the ignition cable and send power out "PV" or "1" to open...