P22 High

Alpha P22 Fault Code

The Alpha P22 fault code means: your boiler has detected that the temperature of the water being heated for your taps and shower is not being measured or managed correctly by the internal sensors.. It appears on 2 Alpha models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: DHW flow temp. (stat)
Typical repair cost £120-220 (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 P22 fault code

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

Source

Alpha P22 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 7 July 2026