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my NTI boiler only works during the day

durangoranchmom
durangoranchmom Member Posts: 1
in THE MAIN WALL

My NTI boiler works during the day but not at night. The central heat function cycles through prepurge sometimes starts to run then goes back to prepurge. During the day it stays on heat until temps are reached. It switches to DHW pretty easily but only after the central heating temps are reached. My heating guy says it needs a new induction motor but if it's mechanical why would it only not work at night? Because it's not working at night it has to runn most of the day to warm the house. Any ideas?

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 25,262

    Natural gas? Gas pressure drops at night in your area maybe?

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    jesmed1PC7060
  • Ironman
    Ironman Member Posts: 7,612

    It’s a union boiler: it’s against its contract to work after hours.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    Tom_133PC7060Rich_49CLamb
  • Tom_133
    Tom_133 Member Posts: 912

    give us more info on what NTI boiler it is, and any other symptoms. Pics of the system as well if you can

    Tom
    Montpelier Vt
  • jesmed1
    jesmed1 Member Posts: 872
    edited January 11

    If you're in Durango, CO, your night temps have been in the teens, and last night was down to single digits. @Jamie Hall may have the right idea. Are you on a ranch with a propane tank? If so you might have this problem:

    https://forum.heatinghelp.com/discussion/191139/propane-regulator-freezing

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