2GIG Z-Wave Thermostat (CT30e) - Battery Replacement
Sep 29, 2025
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2GIG CT30e Thermostat Battery Replacement Guide
The content on this page has been written by a third party and is not maintained by Alarm.com. For installation, maintenance, and usage questions, contact the device manufacturer. See also the 2GIG CT30e Installation Guide.
Battery Warnings & Safety Tips
- Use new AA alkaline batteries (three required). Replace as soon as Low Batt flashes, or at least once per year.
- Failure to replace batteries can cause the thermostat to lose power, leading to overheating or overcooling and potential HVAC damage.
- If batteries fail with heat OFF, risk of no heat and possible frozen/burst pipes. If with cool OFF, risk of no cooling and excessive temperatures.
- If leaving home for a month or more, replace batteries beforehand as a precaution.
Steps to Replace Batteries in the CT30e
- Remove the cover. Slide the front cover straight off to access the battery compartment.
- Insert three new AA alkaline batteries. Follow the polarity diagram. Insert the negative end against the spring first, then press the positive end in. Repeat for all three.
- Press the Reset button. The Reset button (under the top cover) implements the HVAC switch selections.
- Reattach the cover. Slide the cover back on until it seats flush.
- Restore AC power. Turn the breaker back on if it was switched off. The CT30e will power up in OFF mode.
Additional Support
Need help with installation or troubleshooting? Visit our support hub or contact our team.
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