Biasi Riva M90E32S Rapid green flashing light

666Rick666 · 22 Aug 2025

I have a Biasi Riva M90E32S combi boiler with a rapid flashing green light when the central heating fires up. The boiler ignites for around 20 to 30 seconds then cutting off with a rapid green light flash no other lights come on during the sequence just the rapidly flashing green light. I have had several engineers out to the boiler I'll have drawn a blank I am now left try to fix this myself I am a qualified plumber but not gas registered. The picture I have included is the main PCB board and where I have placed the two white arrows a small green to blue flash occurs within the unit as the boiler cuts out and stops

Please can someone help thanks

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Biasi Riva M90E32S Rapid green flashing light

666Rick666

DIYnot Local

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