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  1. #1
    Join Date
    Jun 2009
    Posts
    48
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    Taco ZVC 406 EXP

    Hi all, Having an intermittent problem with Taco ZVC 406 EXP that has worked fine for about 7years now on occasion when there is a call for heat from either of the 2 zones there is no response from the control ie.no LEDs lite and no heat, any ideas? I don't believe the relays are replaceable without resoldering.

    Thanks. G

  2. #2
    Join Date
    Jul 2007
    Location
    Mount Airy, MD
    Posts
    7,282
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    Thread relocated to AOP

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