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  • tek
    replied
    Re: Loud noise when using a particular group

    M20 possibly could have 2 vibrating pumps and 2 expansion valves, my money is on the expansion valve

    Leave a comment:


  • pressurestat
    replied
    Re: Loud noise when using a particular group

    I dont think it is the expansion valve, otherwise the noise would come from both groups. If the pump is screaming on a particular group then I would say it is either the solenoid is partially blocked and if it is the case, try to descale that group or send it to a coffee tech to remove the whole thing and clean it for you or it could be a tiny block in your group head, either way I would recommend a qualified coffee technician to have a look at it.

    Leave a comment:


  • borat123
    Guest replied
    Re: Loud noise when using a particular group

    Best to take it to a service guy. You could try taking off the cup tray and look / listen to see if the sound is obviously coming from the pump.

    ** But dont poke / prod or otherwise touch anything inside with the power on / connected......

    Leave a comment:


  • maheel
    replied
    Re: Loud noise when using a particular group

    if its not actually the pump I at a guess i thought it might be one of those spring overpressure valves / expansion valves things on a copper pipe.

    i have heard one of those "screaming" as it sort of vibrated to let water out. when it did it let water dribble / squirt into the drip tray drain.

    worth a guess and a look?


    Leave a comment:


  • A_M
    replied
    Re: Loud noise when using a particular group

    Originally posted by 746E64747F373736070 link=1282857972/0#0 date=1282857971
    Hello, have a strange problem. I have a Cimbali M20, when I use the hot water and the right group the sound of the pump is NORMAL, however when I use the left group the pump is SCREAMING, pls help as this is starting to worry me

    Cheers
    See ya local service person...

    What is ya location..

    1: Is it the pump that is actually making the noise ?

    OR

    2: A valve / solenoid that has some crap in it and it is them making teh noise ?

    Leave a comment:


  • sicsx001
    started a topic Loud noise when using a particular group

    Loud noise when using a particular group

    Hello, have a strange problem. I have a Cimbali M20, when I use the hot water and the right group the sound of the pump is NORMAL, however when I use the left group the pump is SCREAMING, pls help as this is starting to worry me

    Cheers
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