Maintenance Guides / Safety & Electrical

Replace smart thermostat backup batteries

Difficulty: easyTime: 10 mins

Why it matters

Smart thermostats use backup batteries for settings during outages.

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How to do it

  • 1

    Turn off thermostat's breaker for safety.

  • 2

    Open battery compartment on back/side.

  • 3

    Note battery size and polarity.

  • 4

    Remove old batteries.

  • 5

    Insert fresh batteries matching polarity.

  • 6

    Close compartment and restore power.