BoilerFaultCodesTechnical description
Faulty programming unit (user interface)
What causes this fault?
This fault occurs when the main brain of the boiler loses touch with the display panel where you adjust your settings. The most common reason is a physical hardware failure within the control unit itself or a loose internal wiring connection that prevents data from flowing back and forth. Because the display can no longer tell the boiler what to do, the system shuts down for safety.
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 →