Low
5 green flashes on Baxi Suprima 100

Your boiler has experienced a temporary computer glitch that it is currently trying to fix itself.

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 automatically reset itselfIf the flashing continues for more than 10 minutes, turn the control knob to 'Reset' and then back to the desired temperatureMonitor the boiler to see if the green light returns to a steady state

Find a Gas Safe engineer
Search the official register →

Related guides you might find useful

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 →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →