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No heat w/new-ish Buderus boiler

Lil-Roc Member Posts: 50
Have a Pro come out. More likly pilot oriface is plugged with soot. I'd start there then check gas pressure,then gasvalve itself. Again have a Pro look at it.


  • no heat w/newer buderus

    Hello Gents:

    Homeowner here--been on the board before with questions about a poor changeout of a Buderus G124x, standing pilot. I've had various troubles with it (aquastat, autodamper, etc) but generally it's run OK.

    My problem now is that the pilot went out sometime yesterday--no wind, gas outage, or anything --seems like it just went out.

    Now, I can't keep the pilot lit.

    Unfortunately, I got the short end of the stick on the install (their piping/sizing and such was heavily panned on the Wall.

    Nobody else seems willing to service Buderus in my area, and I really don't want to call the people who made such a mess of the original install. But it's getting cold!

    As I said, pilot won't stay lit. There is gas, nice blue flame when pilot button on the Honeywell valve is held down. Soon as I let go, it's out.

    Main power fine, 24 Volts all the way to valve assembly. Thermostat calls for heat, and I hear the click when it does.

    I guess this is probably the thermocouple? It's only four years old, but seems most likely?

    Anyway to temporarily over-ride it so it will fire until I get help?

    How hard a fix is it?

    Thanks for any help you can give...I'm trying to make the best of a bad situation.


    General Info:
    Buderus G124X25 Gravity conversion, hot water system. One zone only to old fashioned rads. Four years old.

    Original Aquastat failed within a year and was replaced with a simpler Honey L8148J. Flue damper glitches resulted in damper being disconnected too.

    Gas control valve is Honey VR8200H1004
  • Paul S_3
    Paul S_3 Member Posts: 1,257

    most likely the thermocouple...its easy to install ...theres usually instructions on how to install it. but like the other guy said about the orifice in the pilot assembly and to check gas pressure you should have a pro come out
    ASM Mechanical Company
    Located in Staten Island NY
    Servicing all 5 boroughs of NYC.
    [email protected]
  • Mad Dog_2
    Mad Dog_2 Member Posts: 6,753
    How far in to the BOONIES are you???????

    The thermocouple on the Buderus and quite easy to do, but you should be a pro. Worst case, get a good local, heating or plumber company ...they'll be more than capable. Mad dog

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
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