Since 2000 we have had a Potterton Suprima 80 boiler. It worked fine
for 5 years but for the last 3 years has slowly been collapsing. We
have had 3 new PCBs, the last one fitted 10 days ago, and still the
boiler locks out. We have also had 3 sets of thermistors and
associated sensors to no effect.
What can be going wrong? Does anyone have some advice?
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