D1 241 High
Your boiler has lost its connection to the sensor that monitors the water returning to the unit, causing it to stop working for safety.
Technical description: The contacts of the boiler return temperature sensor have been interrupted
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 D1 241 — no call-out fees, no surprises.
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Parts commonly replaced
- Return temperature sensor (NTC)
- Wiring harness connector
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