E30 High
Your boiler has detected an electrical fault with the internal sensor that monitors water temperature, causing the system to stop working for safety.
Technical description: Flow sensor short circuit – check connections to flow sensor
Typical repair cost: £120-£200 (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 E30 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow thermistor (NTC sensor)
- Wiring harness
- Main PCB
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