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:

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