414 Medium
Your boiler has lost communication with the temperature sensor responsible for the third heating zone in your home, meaning that specific area may not heat correctly.
Technical description: Room sensor circuit open or short circuit zone 3
Typical repair cost: £90-180 (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 414 — no call-out fees, no surprises.
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Parts commonly replaced
- Room thermostat
- External zone sensor
- Wiring harness
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