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Utica Boiler MAH 125 won't start

I've a Utica Boiler MAH 125 condensing boiler that won't start. For the past month or so, the boiler would light up, then cough, then light up, then cough until it either lights up for a while or shuts off. Sometimes it would work smoothly, other times it might take 10 minutes or more to get it to light up for a while. Two days ago, the boiler decided to only start the blower motor and stays on run until I pull the plug.

I hope someone out there in HeatingHelp land has the cure.




    EBEBRATT-Ed Member Posts: 15,612
    I don't think there is a magic fix. Sounds like the combustion is off. All you can do is check and make sure the flue pipe and air intake are clear....could have a wasp nest, dead bird etc.

    Also find the pressure switch(s) disconnect the tubing and make sure the tubing and where it connects to is clear sometime you get a spider or cobweb in them

    Other than that your probably will have to call a service tech
  • Ironman
    Ironman Member Posts: 7,379
    Also, make sure the condensate drain and trap are clear.

    The flame rod may also need cleaning or replacement.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.