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Weil McLain Gold CGA flame stays on always

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  • Weil McLain Gold CGA flame stays on always

    The unit stays on all the time, meaning the flame does not shut off.
    I have changed the thermostat in section one of three. Section one appears to be the only heaters that get hot and generates heat.

    Since changing the therostat did not work, I disconected the two wires to this thermostat and it still stayed on.

    The only way to turn it off, is to turn off the main switch.

    Any suggestions are welcome.

  • #2
    Re: Weil McLain Gold CGA flame stays on always

    You most likely have an end switch wire crossed. If you disconnect the TT wires at the boiler and it shuts down then trace back to the end switch wires and be sure you have them grouped one from each zone valve to a side of the TT.

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