Medium
L5 on Keston System S30

Your boiler has been manually reset too many times in a short period and has now locked itself out as a safety precaution.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

5 boiler resets in 15 minutes

DIY fix possible

Turn the power to the boiler off at the fused spur switchWait at least 5 minutes for the system to clear its internal memoryTurn the power back on and see if the code has cleared

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful