5 Green Flashes Low
Your boiler has experienced a temporary electronic communication glitch and is attempting to sort itself out automatically.
Technical description: Parameter error on parameter storage unit (PSU) or printed circuit board (PCB) – this is a temporary error, the system should reset on its own.
Typical repair cost: £0-280 (including labour)
DIY fix possible
Wait for the boiler to complete its automatic reset processIf the flashing continues for more than 15 minutes, turn the selector switch to 'Reset' for five secondsMonitor the boiler to see if the lights return to a steady green
Protect yourself from future repair bills
A boiler cover plan would cover faults like 5 Green Flashes — no call-out fees, no surprises.
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Parts commonly replaced
- Parameter Storage Unit (PSU)
- Printed Circuit Board (PCB)
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