Technical description
Burner Injector – Propane Stereomatic, Type 7, Rs1/8 3.1mm
What causes this fault?
This fault occurs when the boiler detects an issue with the components that deliver and ignite the gas at the burner, often due to a blockage or wear in the injector. Over time, carbon build-up or a failing gas valve can prevent the correct fuel-to-air mixture from reaching the ignition point, causing the system to shut down for safety. It essentially means the boiler can no longer guarantee a stable and controlled flame.
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.