Thermostat kicks on fan briefly before heat

@ttreat31
Thank you for the feedback. First of all, don’t worry. Blower fan operation will NOT impact your furnace life. I can explain the reason and our approach to improving the experience. We send the signal to the fan for blowing air and furnace to start the heat simultaneously when we see the heating load (call for heating). However, some control board, in your case, has its own device level logic to overwrite our command. It will check the inducer fan, ignitor temperature, valve pressure, etc to determine when to turn on the main blower fan. As a result, at the beginning when the hot plate is not hot enough, it will turn off the fan because the condition is not satisfied. The traditional thermostat does not have the layer of its logic so it is simply controlled by the control board, that’s why you don’t experience it. In our next firmware update, We will add a 30s delay for the fan to turn on during heating. Thank you.

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