PCB Fault

High Severity Engineer Required

The printed circuit board has an internal fault.

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Step-by-Step Fix Guide

Step 1

Try power-cycling the boiler
Step 2 Engineer only

If the fault persists, the PCB will need replacing by a Gas Safe engineer

Gas Safe Reminder

Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.

PCB Fault

Step-by-Step Fix Guide

Step 1

Step 2 Engineer only

Are you a Gas Safe Engineer?