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taco 503 zone panel

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smitty_6
smitty_6 Member Posts: 6
in Thermostats and Controls
the zone to my indirect hot water heater keeps turning on and off every couple of sec turning the circulator  on and off . changed the cube relay seemed to solve problem for a little while any suggestions on what is causing this.

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  • lchmb
    lchmb Member Posts: 2,997
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    aquastat

    Did you check your indirects aquastat? Wiring for lose connections?
  • smitty_6
    smitty_6 Member Posts: 6
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    thanks

    jumped out the aqustat found it to be bad replaced it everything working fine now                
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