Low
F7 328 on Worcester Bosch 24 RSF

Your boiler has experienced a temporary loss of power or a momentary electrical flicker that has interrupted its normal operation.

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

A brief power failure has occurred

DIY fix possible

Press and hold the reset button for five secondsWait for the boiler to complete its restart sequenceCheck that your main electrical consumer unit hasn't tripped a circuit

Find a Gas Safe engineer
Search the official register →

Related fault codes

F0View →E9View →

Related guides you might find useful

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →

Boiler keeps cutting out

Lockout fault with a reset-needed pattern.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →