BoilerFaultCodesAlpha 06 Fault Code
The Alpha 06 fault code means: your boiler is having trouble measuring the temperature of the hot water, which means it likely cannot provide a steady supply of hot water to your taps.. It appears on 24 Alpha models in our database.
Technical description: DHW sensor fault (InTec C, X, GS only) - DHW sensor resistance value is incorrect
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like 06: no call-out fees, no surprise bills.
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Alpha models that show the 06 fault code
Click a model for the full fault code list and model-specific repair notes.
- CD18 / CD24 Repair: £120-200
- Cd50s Cd70s Repair: £250-450
- E-Tec 28
- E-Tec 33
- E-Tec NX Repair: £90-160
- E-Tec NXS Repair: £90-160
- E-Tec Plus 28
- E-Tec Plus 33
- E-Tec Plus 38
- E-Tec Plus NX Repair: £90-£160
- E-Tec Regular Repair: £120-250
- E-Tec S Repair: £80-120
- Eco Repair: £120-200
- Eco 11 13 Repair: £90-160
- Evoke Repair: £120-200
- Evoke 10 / 18 Repair: £90-160
- Evoke NX Repair: £90-160
- Intec 30GS Repair: £120-180
- Intec 40GS Repair: £120-180
- Intec 50CS Repair: £120-200
- Intec S Repair: £120-200
- Intec² 20SE Repair: £120-200
- Intec2 25 28XE Repair: £120-200
- Intec² 30SE Repair: £120-200
Source
Alpha 06 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 31 August 2026