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NTI Boiler 7 zones with pumps - 1 not working

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moots
moots Member Posts: 37
edited August 2021 in THE MAIN WALL
Greetings:

I have a NTI boiler that has a Taco pump per zone (7), no solenoids (weird huh?) Six of these zones/pumps work fine. One zone when calling for heat does not fire the boiler and the pump is not running. I do hear the thermostat click when calling for heat. I removed the cartridge and it is not seized up. All the pumps on either side which are all wired together are fine.

Upon further review now I suspect the control board on the Taco 007 which should activate no matter what correct ? The boiler not firing is simply because the water is not being circulated and the water temp is not dropping for the boiler to fire ? I have 110v at the PCB board on the pump and I have reseated all connections and tried changing the switch to priority with no luck.

thanks,

Dave

Comments

  • Ctoilman
    Ctoilman Member Posts: 105
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    From information given, seems like bad relay somewhere.
    Boiler has no idea what circ pumps are doing.

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