A reset restarts the boiler after certain lockouts; it does not repair the cause of a recurring fault. Start by writing down the fault code and finding the user manual for the exact boiler model.\n\nUse only the reset control and sequence described by that manual. Do not remove the casing, operate unfamiliar valves or repeatedly cycle the power.\n\nAfter one reset, allow the boiler time to complete its start-up sequence. If the same code returns, the boiler repeatedly locks out, there is a leak, unusual noise or any gas or carbon monoxide concern, stop and seek qualified help.\n\nKeep the fault code, boiler make and model, and a short description of what happened. Those details help the engineer prepare for the visit.\n\nThe linked manufacturer guidance explains the general reset process, but your own model manual remains the definitive instruction.