Need some help with my Lelit Bianca paddle.
My machine is 6 months old.
When it was new I calibrated it so that the paddle stops the flow completely when it touches the body of the machine on the left side.
I also tested the paddle flow adjustment with a scale.
Back then, the flow was almost linear from 0.5ml/sec to 6.5ml/sec. And the adjustments were very smooth.
My daily shot making routine includes closing the paddle completely after a few seconds, in order to allow blooming of the puck for about 30 seconds.
Today, I noticed the flow doesn’t stop completely when I close the paddle - pressure continues to build even though it shouldn’t.
I tried recalibrating the paddle, but even if I set it so I can feel the needle stop before it touches the machine’s body, there’s still some dribble .
What concerns me the most though is that in contrast to how it was when the machine was new, now, even with the tiniest adjustment of the paddle, the flow jumps from almost 0ml/sec to 1.5ml/sec.
I did try taking off the mushroom and needle for inspection.
First off - there was a small amount of scale build up on the mushroom - which I wiped.
Secondly - I wasn’t able to take out the gicleur from the mushroom.
Thirdly - I couldn’t see anything wrong with it to cause this.
Attached are 2 videos to illustrate.
I would really appreciate any advice
Mushroom, needle and gicleur inspection
Water flow recording during paddle adjustment