Yup, having the A/C fan running with the heater is a "feature". As rohrmann wrote, you have to set the fan on Auto in A/C mode to avoid having it run in heater mode. Why? Nobody knows the reason but it is documented in the manual for the thermostat.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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