pcb

Hi folks, I've got a Suprima 50 with the new type PCB (Installed 2 years ago). Boiler fires up runs for about 10 minutes (flow good, pumps runs fine). Then the Gas Valve starts clunking (several times in quick succession), the boiler restarts, but shuts repeats process soon after. No lockouts...

Hi, New PCB that i purchased comes up with F70 code (incompatible software). I have been made aware that i need to reset it, however Vaillant woudl only release info ofr GasSafe engineer. Anyone can help? The display has only 3 buttons, Mode, + and - Could not find any info in the manual...