0A30 High
Your boiler has stopped working because its internal temperature sensor has developed an electrical fault and can no longer monitor the water flow.
Technical description: Flow sensor short circuit
Typical repair cost: £120-220 (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 0A30 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow NTC temperature sensor
- Connecting wiring harness
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