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Thread: VBM Domobar Junior Help

  1. #1
    Junior Member
    Join Date
    Apr 2010

    Question VBM Domobar Junior Help

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hello all,

    i have a domobar JNR, purchased 2010
    its been rock solid until recently.

    turned it on the other day and it pumped water for ages and eventually stopped and wouldn't heat.
    i could trick the heater to turn on by pulling the lever.
    however when i did this and it started to boil, water came out the vac valve
    ive check the ground cable to the boiler, its fine
    ive removed and cleaned the water probe.

    im assuming the control board is pork chopped?


  2. #2
    Senior Member Lyrebird's Avatar
    Join Date
    Jun 2018
    Check the fill level probe (and its wiring) before assuming it's the control board, it's a whole lot cheaper to fix the former.

  3. #3
    drx is offline
    Junior Member
    Join Date
    Jun 2012
    Hello ,

    Any progress on this as I am having the exact same issue.


  4. #4
    Senior Member CafeLotta's Avatar
    Join Date
    Jun 2012
    Melbourne, Vic, Aust.
    Might be something of use in this thread -

    Quote from Lyrebird in link above - "BTW I also rewired / rerouted the boiler fill sensor ground wire: the stock configuration (plain PVC insulated wire right on top of the boiler with no standoff) is just plain bad design. I replaced it with high temperature (ECTFE insulated) wire on a 10mm standoff (enough to get it to the outside of the blanket)."

    Quote from TC in another thread - "That ground wire on the steam boiler exposed to ~123C goes crisp and results in overfills due to massive resistance."

    PS Link added -
    Last edited by CafeLotta; 30th March 2019 at 12:55 PM. Reason: Added Link
    Dimal and drx like this.

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