BoilerFaultCodesTechnical description
No 230V P/F to N at any time in a period of 4 minutes.
What causes this fault?
This fault occurs when the boiler's computer sends a signal to start the pump, but detects that no electricity is actually reaching it. The most common reason is a malfunctioning main control board that can no longer switch power on, though it can also be caused by loose internal wiring or a pump that has short-circuited.
This issue often surfaces at the start of autumn when the heating is turned on for the first time after summer, as the pump can seize during long periods of inactivity.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register →