E168 High
Your boiler's internal computer has encountered a memory or electrical glitch and has temporarily locked itself down to prevent safety issues.
Technical description: Printed circuit board (PCB) lockout error
Typical repair cost: £250-£450 (including labour)
DIY fix possible
Locate the selector switch on the front of the boilerTurn the switch to the 'R' (Reset) position and hold for 5 secondsRelease the switch and wait for the boiler to attempt a restart
Protect yourself from future repair bills
A boiler cover plan would cover faults like E168 — no call-out fees, no surprises.
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Parts commonly replaced
- Main Printed Circuit Board (PCB)
- External Voltage Stabiliser
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