The one device that controls both heating and cooling systems in any home is the thermostat. For homes without cooling, the thermostat controls the furnace. SF Gate Home Guides contributor Robert Korpella provides effective and time-tested steps in troubleshooting a home thermostat that can help both you and specialists in Maplewood, MN heating & air conditioning. Here’s how to check if your system has gone bad or not:
- Test the thermostat’s working condition. Set it at 5 degrees higher or lower than you would normally use it for, depending on the season. Observe if the appropriate device activates.
- Check that the thermostat is correctly set to “Heat” or “Cool”, and make sure that the main circuit breakers for the furnace or air conditioner are in the “On” position. After this, turn off the power for the furnace and air conditioning systems by switching the appropriate circuit breaker to the “Off” position.
- Gently pry off the cover of the thermostat. Check the wires, making sure that each is attached firmly to its respective mounting screw. Reattach any loose wiring and tighten loose mounting screws.
- Turn the breakers back on and check whether the device runs by repeating the first step. If it still doesn’t run, turn the furnace and air conditioner power off again through the breaker panel.
- Study the wires inside the thermostat. Select the red and white wires if there are problems with the furnace activating, or the red and green wires if there are issues with the air conditioning system powering on.
- Unscrew the two appropriate wires from their terminals. As you loosen the screws, grip the wires with your other hand so they don’t slip behind the wall.
- Wrap the two wires together, and turn the breaker back on. If the blower for the furnace or air conditioning system comes on, then the thermostat is bad.
If all else fails, you may want to consider completely replacing your old thermostat with a new digital one that could help you save money. The Department of Energy estimates you could save about 10 percent on your heating and cooling bill merely by lowering your thermostat 7 to 10 degrees for eight hours a day during the cold season, and vice-versa during warmer times of the year. This translates to almost enough savings to pay your utility bill for practically an entire month.
To get professional assistance in installing and programming your own digital thermostat, contact a specialist like a technician working with Metro Heating & Cooling who is well-versed in air conditioning and furnace repair in Maplewood, MN.
(Source: How to Tell If Your Home Thermostat Is Bad, SF Gate Home Guides)