Should I set my thermostat fan switch to "auto" or "on" when running my AC?
You should use the “auto” setting so that the fan runs only when needed to maintain the set temperature, especially if you have an old PSC blower motor which wastes electricity. This also prevents reintroducing humidity back into the living space. Once your AC turns off, the blower fan may evaporate condensation off of the evaporator coil. If you desire a more consistent temperature, give us a call. It may be time to upgrade to a higher efficiency modulating system.