I have a new, 3-year old, high-efficiency, gas furnace in my home. I recently realized that my draft inducer, which normally kicks on before the burners and before the main blower, is not stopping.
In the past, this was the normal sequence: 0) Everything Off; 1) Draft Inducer starts; 2) Burners ignite; 3) Blower starts; 4) Burners cut out; 5) Blower and Draft Inducer stop.
Now, instead of the blower and draft inducer both stopping, the blower alone stops. The draft inducer continues to run. The Burners kick on, etc. Instead of 1-5, it's going 2-5 without the draft inducer ever stopping. Why? What should I do about it?
Maybe I'm asking the wrong question. Maybe I ought to be asking why my furnace isn't staying on long enough to raise the temperature 3 degrees. I think it's shutting off prematurely and immediately starting a new cycle.