E34 High
Your boiler has shut down because the electricity supply reaching it is too low for it to operate safely.
Technical description: Low power supply lockout
Typical repair cost: £100-350 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E34 — no call-out fees, no surprises.
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Parts commonly replaced
- Printed Circuit Board (PCB)
- External Power Supply/Wiring
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