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Video:How to Troubleshoot a Thermostat

with Nick Jaynes

Want to learn how to troubleshoot a thermostat issue? Here, see tips and tricks for doing it.See Transcript

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Transcript:How to Troubleshoot a Thermostat

Hi I'm Nick Jaynes for About.com and this how to troubleshoot a thermostat.

Information About How to Troubleshoot a Thermostat

We'll be using tips found on the About.com Home heating and cooling repair site. There are several types of thermostats but they all do basically the same thing; tell your furnace or ac unit to turn on and off. When they don't work there are a few things we can check.

Steps for Troubleshooting a Thermostat

First we'll check the thermostat itself, this is more than likely your culprit. Carefully remove the cover and, check to see if the metal components are dirty if they are gently dust them. You can use compressed air like you find at the office supply store or a soft brush. If you have a unit with a mercury switch you can still dust the components but, this is a fairly reliable system with not a lot of maintenance required.

More Steps for Troubleshooting a Thermostat

Make sure if you find any loose connections to tighten them up. If you have an electric controller, and the display is off the internal battery may have discharged and will need replacing. Follow the steps in the owner's manual to learn how to do this properly. If after cleaning your unit still does not work go out to your breaker box, and make sure the circuit has not been tripped, if it has reset the circuit. If this still does not work and you've tried everything else, you may need to replace the circuit breaker itself.

It would be wise to hire an electrician to do this, as tampering with the circuit breaker box can be very dangerous if you don't know exactly what you are doing. If the heat coming out is too hot the thermometer may be out of adjustment. To remedy this remove the cover and loosen the screws that attach to the thermometer set it level and re-tighten the screws. If you're only problem is that the unit turns off and on repeatedly then your best bet is to clean the thermostat unit as mentioned earlier in this video.

Thank you for watching, if you would like to learn more please find us on the web at About.com

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