3 Green Flashes Low
Your boiler has briefly lost its flame and is attempting to restart itself automatically.
Technical description: Temporary flame loss – this is a temporary error, the system should reset on its own
Typical repair cost: £0-120 (including labour)
DIY fix possible
Wait for the boiler to automatically reset and restart the ignition sequenceCheck that your gas supply is active and that other gas appliances are workingEnsure your condensate pipe has not frozen if the weather is extremely cold
Protect yourself from future repair bills
A boiler cover plan would cover faults like 3 Green Flashes — no call-out fees, no surprises.
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Parts commonly replaced
- Flame sensing electrode
- Ignition lead
- Gas valve
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