E317 High
Your boiler has detected an issue with the electrical frequency of your home's power supply, meaning the electricity isn't entering the unit at the correct rate for it to operate.
Technical description: Wrong power supply (HZ)
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 E317 — no call-out fees, no surprises.
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Parts commonly replaced
- Main PCB (Printed Circuit Board)
- Power supply cable
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