How To Change Honeywell Home Thermostat Battery

How To Change Honeywell Home Thermostat Battery

How to Change Honeywell Home Thermostat Battery

Step-by-Step Guide with Illustrations

Maintaining a comfortable indoor temperature is crucial for your well-being and energy efficiency. A properly functioning thermostat plays a vital role in ensuring optimal temperature regulation. One essential aspect of thermostat maintenance is replacing the battery when it runs low. This guide will provide a comprehensive step-by-step process for changing the battery in a Honeywell home thermostat, complete with illustrations for clarity.

Materials Required:

  • New Honeywell thermostat battery (typically CR2032)
  • Phillips head screwdriver (if applicable)

Safety Precautions:

  • Always turn off the power to the thermostat at the breaker panel to prevent electrical shock.
  • Allow the thermostat to cool down completely before handling it.

Step 1: Identify Thermostat Model

Locate the model number of your Honeywell thermostat. This information is usually printed on the front of the thermostat or on the backplate. Knowing your thermostat model will help you determine the correct battery type and replacement procedure.

Step 2: Remove Thermostat from Wall

Most Honeywell thermostats are mounted on the wall with a baseplate. To remove the thermostat, gently pull it straight off the baseplate. It may be attached with a screw or clip, so be careful not to force it.

Step 3: Access Battery Compartment

Once the thermostat is removed from the wall, you will need to access the battery compartment. Depending on your thermostat model, the battery compartment may be located at the back, side, or bottom of the unit.

  • For most models with a removable backplate, the battery compartment is located behind the backplate.
  • For some models, the battery compartment is accessible by sliding open a door or removing a cover.

Step 4: Replace Old Battery

Once the battery compartment is open, carefully remove the old battery and dispose of it properly. Insert the new battery into the compartment, ensuring the positive (+) and negative (-) terminals match the markings.

Step 5: Reattach Thermostat

Once the new battery is installed, carefully reattach the thermostat to the wall plate. Make sure it fits securely and is aligned correctly.

Step 6: Restore Power

Restore power to the thermostat at the breaker panel. The thermostat should power on and display the correct time and temperature.

Additional Information

Table: Honeywell Thermostat Battery Types

Thermostat ModelBattery Type
RTH2300 SeriesCR2032
RTH7600 SeriesCR2032
T6 Pro SeriesCR2032
T9 ThermostatCR2450

Interesting Facts about Honeywell Thermostats:

  • Honeywell invented the first thermostat in 1885.
  • Honeywell thermostats are used in over 45 million homes worldwide.
  • Honeywell thermostats can help save up to 23% on energy costs.
  • The first thermostat was designed to control the temperature of a chicken coop.
  • Honeywell thermostats offer a wide range of features, including smart scheduling, geofencing, and remote access.


1. How often should I change the thermostat battery?

  • Most thermostat batteries last between 1 and 2 years, but it’s recommended to check them regularly and replace them as needed.

2. What if my thermostat display is dim or flickering?

  • A dim or flickering display is a common sign of a low battery.

3. Can I use any type of battery in my Honeywell thermostat?

  • No, it’s important to use the correct battery type specified for your thermostat model.

4. Why is my thermostat not working after I changed the battery?

  • Make sure the battery is installed correctly and that the terminals match the markings. Also, check the thermostat’s settings to ensure that they are correct.

5. Can I change the battery in my thermostat without removing it from the wall?

  • For most Honeywell thermostats, it is not possible to change the battery without removing it from the wall.
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