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Changing batteries

Hi this is my first time changing batteries on the smart thermostat. Do I need to turn the power off to my boiler at all or can I just unscrew the cover off the wall without doing so and change the batteries?

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  • HGBHGB ✭✭✭
    edited May 12

    I just click the thermostat off the wall to replace batteries. Never heard I had to switch off the boiler. The helpdesk didn't tell me to do so either when they once gave me a step by step instruction.

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