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Viessmann vitodens 200 wb2 11-44 boiler problems

bfriel64
bfriel64 Member Posts: 4
in THE MAIN WALL

hello all I am having a problem where the boiler starts ,lights up,and shuts down right away

This will happen a few times and then it will light

There are no codes but viessmann manual says this symptom is due to flue gas system leaking

I have cleaned out in between radial heat exchanger with tool and flushed thoroughly with water

There is not a glue gas smell

Any help would be appreciated

Thanks

Brett

Comments

  • 109A_5
    109A_5 Member Posts: 2,743
    edited September 19

    Fuel pressure ?

    image.png image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • bfriel64
    bfriel64 Member Posts: 4

    thank you I’ll check I have a manometer

    Brett

  • bfriel64
    bfriel64 Member Posts: 4

    follow up on my viessmann

    Turned out to be the gas valve

    Fortunately I bought a complete used boiler for $550 and had the spare part

    Thanks for the help

    Brett

  • 109A_5
    109A_5 Member Posts: 2,743

    Thanks for the feedback. With changing the Gas Valve you may want to have it checked with a combustion analyzer.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • bfriel64
    bfriel64 Member Posts: 4

    probably a good idea before I changed gas valve I changed the lgm29 board thinking that was the problem the board works but I notice it more short cycles itself to reach boiler temp limits and dhw settings

    With original board in it would crank out on max to reach these settings now it kinda short cycles its way to the settings

    I may put original lgm29 back it to see if behaves as it use to

    I rember that I did not Mach up dip switch settings on replacement board so maybe that’s the problem

    But am super happy it’s working now

    I like this older viessmann it appears to be well built

    Brett

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