Learn how to install and replace batteries in the RTCOA CT30S Thermostat.
What you'll need
- Xfinity Home
- CT30S Thermostat
- Three AA batteries
Difficulty
Medium
Do you need a battery?
Make sure you have batteries before you proceed. Visit your nearest retail store that sells batteries or click the button below to order your replacement battery kit.
Call us at 1-800-xfinity if you receive a low battery alert within 30 days of device installation.
How to install the battery
Before proceeding, make sure that your system is disarmed. Working on devices while the system is armed can generate false alarms.
Did You Know? Before replacing the batteries in your Thermostat, your furnace must be turned off and the Thermostat should be removed from the wall.
Help Protect Our Environment: Please properly recycle your discarded batteries. For your convenience, batteries are accepted for recycling at various locations. Check www.call2recycle.org or call 1-800-8-Battery (1-800-8-228-8379) to find a recycling location near you.
Is This Your Thermostat? Make sure that your Thermostat looks like the one in the image below. If it does, you're in the right place to find out how to install a battery in your Thermostat.
- Locate the white panel on the bottom-front of the Thermostat. That's the battery cover.
- Hold one end of the cover and gently pull it away from the Thermostat.
- Completely remove the cover by holding the attached end of the cover and pulling it away from the Thermostat.
Take a Look. If there are batteries already present, remove them by using your fingertip to gently pull one end of each battery up until that battery is loose. Then, you can pull it free from the slot.
You will see three separate battery slots with positive (+) and negative (-) battery placement indicators. - Insert the first battery into the individual battery slot located in the lower middle section of the battery compartment. Match the positive (+) side of the battery with the positive (+) placement indicator located in the slot.
- Place the second battery in the top slot, matching the positive (+) placement indicator in the slot with the positive (+) side of the battery. This battery faces the opposite direction of the battery just placed.
- The third battery can be pushed into place by sliding the second battery placed to the right. The third battery will face the same direction as the second battery.
- When all three batteries are in place and facing the correct direction in the slots, the Thermostat's screen will light up.
- If you're replacing the battery, confirm that the low battery alert has resolved and the Thermostat appears on your list of connected devices in your touchscreen or the Xfinity Home app.
- Line up the tabs on the Thermostat with the tabs on the inside of the cover. Gently push on one end of the cover until it snaps into place. Then, snap the other end into place.
