Comfortmaker furnace not functoning properly

New blower motor 3 – 4 months old.


Heater had worked well until last night.


Woke up and heater not working.


Thermostat not respond/react to temperature adjustment.


Power down main breaker at least half hour – no change.


So basically no flame/heat and no blower.


Unpluged one contact from limit sensor and a moment later the blower motor kicks on.


Still no heat. :madhell:


Reconnect limit sensor and turn power on – No heat/fan.. 😡


Changed thermostat – no response.


Model specifics: Comfortmaker model ntg3075hfa5 serial L0037 68135


Can’t find manual.


What is the most logical sequence to diagnose/fix this? :confused:

Comfortmaker furnace not functoning properly

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