S.16 High
Your boiler's fan is still spinning after the hot water has been turned off, preventing the system from restarting safely.
Technical description: DHW mode – fan overrun error
Typical repair cost: £150-£450 (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 S.16 — no call-out fees, no surprises.
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Parts commonly replaced
- Fan assembly
- Printed Circuit Board (PCB)
- Wiring harness
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