N
Nicholas HawkinsNov 7, 2025
What to do if my Nortek SC Furnace fails to operate?
- Ttammy62Nov 7, 2025
If your Nortek Furnace fails to operate, start by ensuring the thermostat is operating properly. Also, check if the blower compartment door(s) are securely in place and that the furnace disconnect is closed. Verify that the circuit breaker hasn't tripped or the control board fuse hasn't burned open, and that the gas supply is turned on. Inspect for any open manual reset switches and ensure the filter isn't dirty or plugged. Clean a coated flame sensor with steel wool, check for blockage in the condensate drain switch, make sure the secondary heat exchanger is free of debris and clogs, and ensure the evaporator coil is clean. Finally, check if all the LEDs on the furnace and motor control boards are constantly ON, and check the Blower Limit Switch and Flame Rollout Switch, resetting them if...












