Your boiler has locked itself for safety after too many unsuccessful restart attempts in a short period of time.

Maximum number of resets reached. More than five reset attempts have been reached within 15 minutes.

What causes this fault?

This fault occurs when the boiler's safety software detects too many manual reset attempts in a 15-minute window and enters a protective lockout. It is usually triggered because an underlying issue caused the boiler to fail initially, leading the user to repeatedly press the reset button. The boiler essentially stops responding to prevent potential damage or further safety risks from constant restarting.