[jb753]

I agree defective pumps would explain the problem, but I’m not confident that paying more for ‘genuine’ parts would fix the problem.

I am encouraged that it’s probably not the PCB. The water is definitely hard where I am, so that is a possibility. I will pull apart one of the broken pumps tonight and look for signs of limescale or other friction.

Cheers.

[jb753]

Thanks for your replies.

The first two were fitted by a technician (second time for free under guarantee) and I got the third from ebay. They all say ‘Askoll’ on them, which looks to be the correct manufacturer, but I suppose that is not sufficient to verify if they are genuine articles.

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