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NTI legacy boiler AOS

sia
sia Member Posts: 3
edited October 2020 in THE MAIN WALL
Turned on my boiler and getting an AOS error code. Any tips?

Comments

  • Ironman
    Ironman Member Posts: 7,619
    The flue pressure switch is not closing.

    Check the intake and exhaust pipes for blockage. Checked the condensate drain line for blockage.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • sia
    sia Member Posts: 3
    If the vent fan won’t run will it cause this error?
  • sia
    sia Member Posts: 3
    Thanks I’ll check for blockages 
  • Ironman
    Ironman Member Posts: 7,619
    sia said:

    If the vent fan won’t run will it cause this error?

    Yes.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Henry
    Henry Member Posts: 998
    Call a licensed professional. This is not a DYI fix.

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