Reset your thermostat if it is not working properly. To do so, select the "Reset" option. If your thermostat does not have a reset option, turn it off for a few hours and then turn it back on to see if the settings will reset. Refer to your unit's manual for the appropriate reset steps if your thermostat does not have a reset button.
Test your thermostat if your heat pump turns on and off too frequently. To do so, turn off your heating pump and remove the thermostat from the wall.
Remove the screws on your thermostat and remove the cover to expose the wires. Unscrew the two wires from their terminals. If you see more than two wires, unscrew the white and red ones. These are the standard colors for the power and heat. Refer to your unit's manual if you do not feel comfortable dealing with the thermostat terminals.
Wrap the two wires together. For example, wrap the red and white wires together. Turn on the power and inspect your furnace. Replace your furnace if the blower goes on and the furnace burner ignites. The thermostat is likely damaged and unable to regulate your unit's temperature.
Check the continuity of your wires if the burner does not ignite. Tighten all the screws on the terminals and replace the thermostat cover.
Adjust your thermostat's heat anticipator if the room temperature swings more than 3 degrees Fahrenheit. To do so, remove the thermostat's cover and then use a small level to make sure your thermostat is properly mounted on your wall if you are using a mercury thermostat.
Inspect the heat-anticipator level on your thermostat if you are not using a mercury thermostat. Ensure the small lever moves along the calibrated scale on the thermostat. The lever is the heat-anticipator adjustment and may be marked "Longer" depending on the thermostat you are using.
Adjust the heat-anticipator level closer to the "Longer" setting if your furnace is turning off and on frequently. Move the lever one mark away if the room temperature is dropping low or rising high before the furnace goes on or off.
Leave the thermostat for a few hours so the settings can take effect.
Things You Will Need
- Replace your thermostat if it is still not working well.