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Thread: EM6910 pressure builds up during cleaning and doesn't release into drip tray

  1. #1
    Junior Member
    Join Date
    Jan 2010
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    20

    Question EM6910 pressure builds up during cleaning and doesn't release into drip tray

    Well pretty much what the title says. For a while I have noticed some odd post pour dripping from the group head occurring so decided to clean. Ran the cleaning program and it just stops with pressure needle well into the red which then requires a very gentle and careful release of pressure from the group head. I've already tried pumping through some vinegar and leaving it for an hour and running a cleaning solution from the tank with no change.

    Is it possible to open it up and clean out the offending pipe or valve or is there a cleverer solution?

    Thx in advance

    Graham

  2. #2
    Senior Member Xanthine's Avatar
    Join Date
    Sep 2014
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    S.A. - South Coast
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    181
    Hi lionmonkey.

    There are quite a few posts about this problem.

    Sounds like the solenoid valve is either blocked or it's coil is o/c or there is a problem with the control board.

    This may give you a start-
    https://coffeesnobs.com.au/brewing-e...r-descale.html

    Opening the machine is not recommended unless you have some expertise in safely working on mains powered appliances.

    If you feel you are up to it there is lots of info and photos on tackling the solenoid ('three way') in the "Midrange" section.

    PS Vinegar is a descaling agent - blockages in this area respond better to back-flushing with a detergent type cleaning powder or tablets as per the instruction manual.
    Also, the thin brass plunger guide tube through the solenoid coil is prone to splitting and dripping water onto the electricals below with seriously damaging results.

    Hope this helps get you started
    Trev

  3. #3
    Senior Member artman's Avatar
    Join Date
    Jun 2006
    Posts
    2,237
    It could also be a blockage in the copper tube the water needs to go through to dump into the drip tray, this was the cause in one machine I cleared.

    Cheers

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