E168
FAULT CODE
Main Heating
PCB Lockout / Unspecified Fault
High Severity
Engineer Required
The PCB has detected an unspecified fault and locked out the boiler.
Cold Weather Note
Check for frozen condensate pipe in winter before assuming PCB failure.
Step-by-Step Fix Guide
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Step 1
Turn off at mains for 10 minutes, then restart
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Step 2
If fault returns, reset once
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Step 3 Engineer only
If E168 persists, call 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.