E168
FAULT CODE
Potterton
PCB Lockout / Unspecified Fault
High Severity
Engineer Required
The PCB has detected a fault it cannot specifically identify and has locked out the boiler.
Cold Weather Note
Check for frozen condensate pipe before assuming PCB failure.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler at the mains for 10 minutes, then restart
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Step 2
If the fault returns, reset once using the reset button
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Step 3 Engineer only
If E168 persists, call a Gas Safe engineer to diagnose the PCB
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.