Unfortunately, adding a 15-second delay between fan and heating did not fix the problem for me. With the update, my fan comes on for only a brief second and is immediately shut off by the furnace. Apparently, the arbitrary choice of 15 seconds is not quite long enough for my furnace. Now, I’ve got this extremely short cycling of my fan motor, which I know is not good for it despite what Wyze claims.
Why is it an arbitrary 15 seconds? Is that long enough for others on this forum?
The problem, as pointed out by many folks elsewhere on this forum, is that the thermostat simply should not turn on the fan when calling for heat from a gas furnace. The furnace itself will control the fan, independent of the thermostat, and turn it on only when it is ready. That’s the way thermostats and gas furnaces have interacted for many, many decades.
Why not fix this correctly and not turn on the fan when calling for heat from a gas furnace?