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Troubleshooting Your Thermostat

Pick one: it's freezing/sweltering out, and you're a) turning into an ice sculpture or b) sweating like a fiend. Before you throw in the towel and make a service call, make sure the problem isn't something you can fix yourself - like a simple glitch with your thermostat. Here's what you need to check.



Step 1

Step 1: Remove the thermostat cover plate Turn off power to the heating/air-conditioning system at the main service panel. Remove the thermostat cover plate.

Step 2

Step 2: Remove the thermostat body with a screwdriver Remove the thermostat body by loosening the mounting screws with a screwdriver.

Step 3

Step 3: Inspect the wire connections and reattach any loose wires Inspect the wire connections on the thermostat base. Reattach any loose wires. If the wires are broken or corroded, they should be clipped, stripped and reattached to the screw terminals. Replace the thermostat body and cover plate. Restore power at the main service panel.