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 |
|
| Bad Fan Timer Board |
|
| Item lodged in inducer |
|
CHECKOUT
- Check Power
- Check for 24VAC between "R" and "C" on the Fan Timer Board.
- No Power --> Check Blower Door Switch and High Voltage Power to Furnace
- High Voltage but no Low Voltage -->Check fuse and transformer.
- Set thermostat to call for Heat
- Check 24VAC between "W" and "C" on the terminal block.
- No Power = No Heat Call, Check Thermostat
- Power present but Inducer Not Running = Bad Inducer or Bad Fan Timer Board
- Check Inducer Power
- Check for 120V power between D1 and Neutral on the Fan Timer Board
- Power but No Inducer = Bad Inducer Motor / Capacitor or Item Lodged in Inducer