Low
5 green flashes on Baxi 800

Your boiler has experienced a brief computer glitch while loading its settings, but it is programmed to fix itself and restart 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

Parameter error on printed circuit board (PCB). Temporary error, will self reset

DIY fix possible

Wait for the boiler to self-reset automaticallyIf the flashing persists for more than 10 minutes, turn the selector switch to 'Reset'If the fault continues to return, monitor the boiler and contact a technician

Find a Gas Safe engineer
Search the official register →

Related fault codes

E160View →

Related guides you might find useful

Boiler keeps cutting out

Lockout fault with a reset-needed pattern.

Read →

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →