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Dealing With Dead Thermostat Batteries

If your thermostat is battery powered, then you'll need to replace the batteries from time-to-time. It's a straightforward fix, but you'll want to take the right steps when it comes to replacing the batteries.

Check Your Thermostat Batteries

A blank thermostat usually means there's no power running to it. The batteries may be dead.

How to check your thermostat batteries

  • Does your thermostat use batteries? If so, try swapping out the batteries for new ones.

  • Check to see if the breaker has tripped or the power switch is off. Heating and cooling systems use a 24 volt transformer to supply low voltage power to the thermostat. If the heating and cooling unit circuit is off, the transformer will be off, and so will power to your thermostat.

  • If the heating and cooling system is still not working, check for water in the safety overflow pan, often located under the indoor HVAC unit.

    The overflow pan is there to catch water should the drain become clogged. The pan has an overflow switch that will stop the system from operating to limit damage to your property and make you aware of a developing problem. However, if the system is switched off, so will the power to your thermostat.

  • If these steps did not restore power to the thermostat, a technician is needed. They will have the proper tools and knowledge to correct the issue.

What To Do If Your Thermostat Batteries Are Dead

The simple solution is to replace them! Once new batteries are in the thermostat, your air conditioning system should run smoothly. If it doesn't get your system up and running, there's another problem: have a HomeX technician virtually diagnose the issue for free!

Want to fix your thermostat?

NOTE: This content is for informational purposes only, and HomeX and its affiliates disclaim all liability related to it. If you decide to perform any tasks based on this information, you assume all risks, including the risk of loss or damage to property or personal injury.

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