Low
4 green flashes on Baxi Eco Compact

Your boiler is having a temporary glitch in its internal computer system and is attempting to fix itself automatically.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Communication error between printed circuit board (PCB) and control. Temporary error, will self reset.

DIY fix possible

Wait for the boiler to automatically reset itselfCheck that external controls (thermostat) have power and batteriesTurn the boiler off and back on at the fused spur switch

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