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-   -   New prog. Thermo has 2 black wires. Old one has 2black,2red.. How to connect (https://www.askmehelpdesk.com/showthread.php?t=526231)

  • Nov 15, 2010, 06:45 PM
    reform
    New prog. Thermo has 2 black wires. Old one has 2black,2red.. how to connect

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