Q: My inhouse contractor passed away and I moved. Bought a place with Carrier ZONECC0USI01B stat. Looks old. Heat/cool only. No book. Should fan be set on "on" and run continuously or leave with no on/off indicated and
just set Heat or cool?
Asked by widow of HVAC guy 3 years ago
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Verified Reply- SupplyHouse Staff
Hello, thanks for writing in. When set to "on", the fan will run continuously regardless of whether the thermostat is calling for heating or cooling. When set to "auto", the fan will only run when the thermostat calls for the unit to come on.
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