BoilerFaultCodesTechnical description
Burner lock after heating mode
What causes this fault?
This status code occurs when the boiler has finished a period of high-intensity heating and needs to temporarily shut down the burner to let the heat exchanger cool down. It is a protective measure to ensure the internal components don't exceed safe temperature limits. Once the internal sensors detect the temperature has dropped to a stable level, the boiler will automatically resume normal operation.
This is more common during the winter months when the boiler is running at maximum capacity for long periods to heat a cold home.
DIY fix possible
Wait up to 20 minutes for the status code to clear automaticallyEnsure radiators are turned on and TRVs are open to allow heat to dissipateCheck that the system pressure is between 1.0 and 1.5 bar on the digital display