Lelit Elizabeth slow brew pressure buildup, even with blind basket

[Duunnnn]

Hi

I have a 1 year old lelit elizabeth which began to show pressure issues. Even with blind basket it takes 15-20sec to reach 9bar pressure, while previously it would need only a couple of seconds. What could be the issue?

Steam pressure wand and water dispenser works fine.

Thanks

[DaveC]

Could be limescale related....depending on the water used. Does the flow rate from the group look normal when doing a water flush or shot with no preinfusion functions on?

[Duunnnn (original poster)]

I think the waterflow is weaker than it should be.