Low
4 green flashes on Baxi Assure

Your boiler is temporarily failing to talk to its internal computer, but it should fix itself automatically in a few moments.

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 up to 10 minutes to see if the boiler resets itselfTurn the power switch found near the boiler off and back on againEnsure any external thermostat or smart hub is powered on

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