How much does it cost to fix Alpha error code 17?

Typical repair cost for the Alpha 17 fault is £120-200 including labour.

17 Medium

Alpha 17 Fault Code

Q: What does the Alpha 17 fault code mean?

Your boiler is struggling to detect the temperature of the hot water, which means it will likely stop providing hot water to your taps until the faulty sensor is replaced.

The Alpha 17 fault code means: your boiler is struggling to detect the temperature of the hot water, which means it will likely stop providing hot water to your taps until the faulty sensor is replaced.. It appears on 1 Alpha model in our database.

Technical description: DHW temperature 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.

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Alpha models that show the 17 fault code

Click a model for the full fault code list and model-specific repair notes.

240XE Repair: £120-200

Source

Alpha 17 fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026