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Replacing Thermostat Batteries for Cox Home Security

Last Updated: Mon, 31 Mar 2014 > Related Articles

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Replacing thermostat batteries is important to maintain your heating and cooling system within Cox Home Security. Learn how to replace the batteries in your thermostat.


Batteries should be replaced at least once a year. Replacing the batteries helps to prevent leakage that can corrode and damage the thermostat. Replace the batteries when you see the low battery indicator on your thermostat. If the batteries are allowed to deplete completely, your heating and air conditioning system cannot function properly.

If you will be away from home for a month or more, consider replacing the batteries before you go to ensure continued operation while you are gone.

To replace the batteries in your Home Security and Automation thermostat, you need three AA batteries. No tools are required to replace the batteries. Follow the steps below to properly replace your thermostat batteries.

If the thermostat batteries fail with the heat OFF, this can result in no heat and possible frozen or broken pipes and water damage. If the thermostat batteries fail with the cool OFF, this can result in no cooling and could cause possible damage or excessive temperatures.

  1. Get three brand new AA batteries.

    Note: Always use new alkaline batteries.

  2. Remove the bottom cover on your thermostat, the white portion below the screen, by grasping on each side and pulling forward.The batteries are exposed two in front and one behind.

    Note: Keep the direction and polarities of the batteries in mind when installing the new batteries.

  3. Remove the old batteries.

Insert the new batteries, being careful to match the placement you observed.

Battery Diagram

  1. Remove the top cover on the thermostat.
  2. Locate and press the Reset button.

    Note: The Reset button can be found under the top cover and is labeled RESET.

Thermostat Reset Button


Once the display returns to the screen, replace the covers.


Check your touchscreen or the Subscriber Portal to ensure the thermostat information displays.

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