Hi all, I have just joined the forum, having followed DaveC YouTube reviews for some considerable time.  My Lelit Bianca, which I bought in 2020, has developed an annoying issue, which is that when the brew lever is in the “idle” position, the pump will quite often switch on as if the lever has been moved into the “brew” position.  This seems to be triggered by vibration, such as when water is pumped from the reservoir to the boiler or putting the portafilter into the group head.

This doesn’t happen every time I use the machine but often enough that if I want to leave the machine on, I have to put the brew lever into the exhaust position to avoid the risk the pump will trigger, and I come back to a flooding drip tray.

My initial thought is that somehow the spring loaded cam follower has come closer to the cam than it should be.  Given that I haven’t ever opened up the machine, this seems odd that it should have moved closer to the cam follower than previously.  I did service the group a month or so ago with the service kit from Bella Barista, which included replacing the brass cam within the group head and so was wondering if the spindle is very slightly off straight, but again this seems unlikely as all the parts went back together easily and seem aligned.

Has anyone come across this issue before and if so, how did you solve it?  Many thanks in advance

Have a look at the roller switch behind the handle. May need adjusting

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    What is the idle position ?

    Mine is either in the exhaust or brew position.

    Thanks Cuprajake and DaveC. The obvious next question is how easy is it to adjust the roller switch?

      MartinD Thanks Cuprajake and DaveC. The obvious next question is how easy is it to adjust the roller switch?

      The switch is poked through a small hole on the front panel. The red arrow points to a thin nut on the front panel…with an open ended spanner, turn it anti clockwise half a turn or so. The tighten a similar nut at the rear of the panel…this draws the switch inwards a little. You may have to complete the tightening on the front nut, if you can’t get good purchase on the one inside.

      The rear nut might be awkward to reach

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        Thanks DaveC. Very helpful and will let you know if I have any problems or the fix doesnt solve the issue. For what it’s worth, I also found quite a good video on the Lelit YouTube channel which shows what needs to be done.