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Biasi 10

had a new Biasi 10 oil heat boiler installed in Jan. 2018 . no matter how high I set thermostat ,the house doesn't heat up past 60 degrees .the installer has been here twice no answers yet . my old heating system didn't have any trouble heating the house . Any ideas what the problem is ?


  • Cokomo
    Cokomo Member Posts: 12
    That’s a nightmare for everyone thinking of getting a new boiler...
    HVACNUT Member Posts: 4,595
    What aquastat is being used?
    If its the Hydrostat 3250 Plus and high limit cant be raised past 140, then remove the pin jumper at the top right corner of the Hydrostat. Turn off the power first.
  • STEVEusaPA
    STEVEusaPA Member Posts: 5,690
    Call the original installer, who should be at least embarrassed that they installed something that doesn't work. Tell them if they can't fix the problem, you'll find someone who will, and send them the bill.

    We can only speculate here as to what could be wrong-not being there, not seeing any pictures, not knowing your heat loss, piping configuration, type/amount of radiation, size of piping.

    -Maybe the boiler is too small.
    -Maybe it's not piped correctly
    -Maybe a circulator isn't working/wired incorrectly.
    -Maybe its a control and/or setting issue
    -Maybe there is not enough water in the system
    -Maybe there is an air locked zone.

    etc., etc...
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,451
    > @Cokomo said:
    > That’s a nightmare for everyone thinking of getting a new boiler...

    The real nightmare is the boiler over sized by a factor of 3 or 4 which outnumber undersized boilers by 1000 to 1
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