F016 High
Your boiler has detected an internal communication error or a connection issue with a sensor that monitors the main heat exchanger.
Technical description: Mounting fault S3
Typical repair cost: £120-250 (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 F016 — no call-out fees, no surprises.
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Parts commonly replaced
- S3 Sensor
- Wiring Loom
- Main Control PCB
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