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Low pressure on EM6900

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  • Low pressure on EM6900

    Hi,

    7 year old EM6900 (one of the last) and EM0480 grinder.

    I seem to have low or reduced water pressure group head.

    The machine has worked consistently well and predictably on a 12 - 15 grind producing a 25 - 30 sec double shot in the 2 o clock position. perfect, steady, like clockwork for its whole life.

    Lately, it is almost impossible to prevent the gauge from going into the red and pouring 45-60 second trickle shot.  I have also stepped the grinder back to 19/20 and cannot even tamp. I updose and level off the top lightly.  Any kind of tamp basically blocks the shot so nothing comes through and not updosing gives you a soaking wet puck.

    It has never had to be anywhere near this coarse in the entire 7 years I have had the machine, no matter what coffee i have used.

    On an empty basket the water appears to come through normally, but Im not sure.  I wondering whether the water flow is restricted in someway which is causing the gauge to shoot into the red zone. 

    Does anyone have any suggestions before I make the trek out to Seven Hills to get it looked at?

    Thanks
    rdu

  • #2
    Re: Low pressure on EM6900

    rdu,

    Welcome to Coffeesnobs.

    Are you using a double walled filter with a blocked lower hole? If so, clear the hole with a needle.

    Double walled filters are made to get fake crema from stale coffee and are supplied with the cheaper machines.

    It is better to get a single walled filter and to use fresh beans.

    Also have you cleaned  the machine recently, in the way recommended by Sunbeam?

    Barry.

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    • #3
      Re: Low pressure on EM6900

      Hi there. Im a long time reader, first time poster

      Im using the original filter. I ripped the plastic insert out pretty much when I bought the machine on the recommendation of this forum, so thats not the issue.

      Ill try the clean tonight to see if that helps.



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      • #4
        Re: Low pressure on EM6900

        If your filter basket is dual walled, single walled ones are available on evil bay.

        Barry.

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        • #5
          Re: Low pressure on EM6900

          aah, i see what you mean. no I dont believe so. Im using one I bought from coffeeparts a few years ago. will check.

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