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Hi Gasescape - are you referring to slow (approx. 5 seconds) amber/yellow flashing? Is this traceable to a dry-joint or particular component failure? So much for the board re-design if it's again a common design fault. How daft to put the PCB on the side of the boiler anyway - why not...

Super... Part code is 404516 and it's an NTC thermistor with 1MOhm resistance at 25c and 73k Ohm at 82c. Hopefully it's just this little beastie rather than the main PCB... Anybody else similar experiences?

Thanks for the reply... The newer (Siemens) PCB has a tri-colour LED so it can be green or red, or with both red and green they make a yellowy colour, which isn't green or red! The boiler does fire up, typically when it wants too (although within the expected timer/thermostat settings for...

Hello... Only now I've started to 'google' for solutions to my Suprima 80L boiler problems can I see why it's referred to as 'Suprima Hell'... The boiler was installed in 2005 just before Regulations changed requiring Condensing boilers to be installed. It had the original PCB changed about...