Heil Gas Furnaces: NTGM, GNK Re: Product Overview 90% Condensing Gas Furnace NTGM / GNK - Upflow/Horizontal NCGM / GCK - Downflow/Horizontal PARTS Honeywell "Smart Valve" Gas Valve - Use GV.03 for Replacement ST9120U Fan Timer Board

Heil Gas Furnace: NTGM, GNK, NCGM, GCK Re: Burners Don't Ignite These furnaces use a Honeywell Smart Valve for ignition control. When the Smart Valve receives 24V from the Fan Timer Board it opens its pilot valve and energizes a 24V glow plug. When pilot flame is sensed, the Smart Valve...

Heil Gas Furnace: NTGM, GNK, NCGM, GCK Re: Inducer Fan Won't Start / Vent Motor Won't Start The inducer / vent motor on this furnace is controlled by the Fan Timer Board. Possible Causes (From Most to Least Likely): Qty Bad Inducer Motor Bad Inducer Motor Capacitor ...