An automatic thermostat is an easy upgrade to put in your home and one that pays for itself in very little time. When installing a thermostat, it’s location that’s the most important thing to consider. Because the thermostat regulates the temperature in your home when it senses if it's too hot or cold, avoid placing it near a bathroom door (where hot steam can escape), near a door that goes outside (letting in cold or warm air) or on window-filled walls where hot rays could shine directly on it. And never place it on an outdoor wall; it will always read the temperature as too cool or too hot and will never get your indoor temperature right.
ANDREWS MCMEEL SYNDICATION