I was a funace tech years and years ago, back when standing pilots were the norm. I have a Lennox Furnace, when the tstat calls for heat the main blower comes on before the ignition cycle has finished. This makes for cool air to be circulated until it warms up. I'm curious if there is a timer or temp switch that could have failed or are they incorporated into the control board? Thanks.
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Furnace blower comes on before ignitionPage Title Module
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