Yeah there are plenty on there too. I have also replaced all the seals and even had the heater out. Depends of your water, here ours is soft so slightly acidic. Removing the heater is did have deposits over it. A night in a small tub with a degreasing solution soon put it right. It’s all pretty easy apart from one of the screws on the pump. It’s difficult to get at so you’ll need a long handled slim cross head driver. If the pump goes it first starts to rattle, then you get the E02 error code.
View: https://youtu.be/37Sd4_nSqs4
