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would appreciate some further advice regarding thought process i should go through. i went to the potterton suprima website, which mentioned that suprima 30's efficiency = 70%. right now i think it would even be less than that even if the pcb were to be replaced given that the bolier is into...

thanks everyone for your replies. since my post, i have discovered many, many more posting about potterton and in particular regarding the suprima range. i guessed i should count myself lucky to have lasted into the sixth year before the problem surfaced. @corgiman - no annual check. tho...

another potterton suprima 30 disaster story! hi all, i have a 6 years old suprima 30 boiler from potterton. the last month it has been 'not right'. whilst on the timer, it would come on at the preset times but the duration of staying on (i.e. fired up) is variable - from a few minutes to...