I did a similar thing to thwart a roommate who would always turn down the thermostat so it was frigid inside. I changed the calibration so it would show a tempe

I did a similar thing to thwart a roommate who would always turn down the thermostat so it was frigid inside. I changed the calibration so it would show a temperature a few degrees lower than reality. He never touched it after that, and the rest of us didn't have to wear sweaters indoors.