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    dabsr Posts: 1, Reputation: 1
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    Jan 25, 2011, 05:19 AM
    Weil Mclain 18yr old furnace - 1 "failed" zone of a 4 zone forced hot water system
    I just bought a house that was built in 1993 and has a gas fired Weil Mclain furnace, forced hot water, with 4 zones - each with a Taco Zone Valve. The system also has one circulator pump.
    In late fall, I ran the system and all zones worked fine.
    When winter came and system was on 'full time', it worked fine as well... now 1 zone is not working. I was told by previous owner that the Taco Zone Valve powerhead's "go" or fail on occasion so I replaced the suspected one last night. That zone still isn't working.
    What can I do next ?

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