It does work but it is meant more for Commercial applications. You would need to program it to have at least a 3 deg F difference between when the cooling cuts in or every time the missus bakes something the AC will cut in. May be warm in the kitchen and cool in the rest of the house. This can short cycle the unit or run it with a low load which can harm the compressor. I would not recommend it. I would have to see the specs on it to see if it can have a 3-4 deg F deadband/differential for switchover. I would recommend shades/roller blinds or drapes to reduce the heat load/sunlight infiltration.