how can I fix my Potterton Suprima?
Hi ,Ihave a Potterton Suprima 30L-50L which is in the loft so it is a pressured system. Every year in the summer, when the heating off at about this time, It starts to make a churning sound when its pumping. I've tried bleeding the radiators, but this has no effect.Can any body help me please!!!!
steve c
July 2009
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