E2 High
Your boiler's internal temperature sensor is failing to provide a correct reading, preventing the heating from starting up safely.
Technical description: Central heating (CH) flow negative thermistor coefficient (NTC) sensor defective
Typical repair cost: £90-160 (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 E2 — no call-out fees, no surprises.
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Parts commonly replaced
- CH Flow NTC Sensor
- Connecting Wiring Harness
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