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    Upgrading honeywell st699 to hive wiring question

    20220126_215955 by Bedster posted 27 Jan 2022 at 10:41 AM This is the existing wiring of the st699 I want to upgrade to a hive. I follow everything except the second blue wire that is going into the neutral port. The darker blue wire looks like an actual neutral wire , could the light blue...
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