F17 High
Your boiler has stopped working because the electrical power coming from your home's mains supply is too low for it to run safely.
Technical description: Power supply is less than 170V
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 F17 — no call-out fees, no surprises.
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Parts commonly replaced
- Main PCB (Printed Circuit Board)
- Low Voltage Transformer
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