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Hi, I posted this last night, was up at the crack of dawn this morning and have just come in, so I will thank you now for the replys if thats OK. I trained as a Heating and ventilation draftsman a long long time ago and did some time on the tools but no current quallifications, just thought I...

Hi, I'm having problems with my Potterton Suprima 80, it is 6 yors old and 2 years ago I replaced the original PCB for a new siemens PCB including wiring, all has been fine till about a month ago. All the lights are OK as per manual. The boiler fires and runs but after a while it sounds like...