BoilerFaultCodesTechnical description
Circulation pump with 2 minutes run-on time
What causes this fault?
This fault occurs when the boiler's control system loses communication with the internal pump or detects that it isn't circulating water correctly. The most common reasons are a physical failure of the pump motor or a fault in the electronic signal between the pump and the main control board. When this happens, the boiler shuts down as a safety measure to prevent the internal components from overheating.
This issue is frequently seen at the start of autumn when a pump that has been inactive all summer becomes 'stuck' or seized upon the first demand for heating.
DIY fix possible
Check that all radiator valves (TRVs) are open to ensure water can circulate freely.Restart the boiler using the power button to see if the message clears.Ensure the system pressure gauge is between 1.0 and 1.5 bar.