How much does it cost to fix Alpha error code 34?

Typical repair cost for the Alpha 34 fault is £150-300 including labour.

34 Emergency

Alpha 34 Fault Code

Q: What does the Alpha 34 fault code mean?

Your boiler has detected that the air supply or exhaust system is not working correctly, meaning it has safely shut down to prevent unsafe gases from building up.

The Alpha 34 fault code means: your boiler has detected that the air supply or exhaust system is not working correctly, meaning it has safely shut down to prevent unsafe gases from building up.. It appears on 5 Alpha models in our database.

Technical description: Room sealed chamber

Typical repair cost £150-300 (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 34 fault code

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

240XE Repair: £150-300
C25 Xtraflame Repair: £120-250
H25 Xtraflame Repair: £120-250
Intec 28GS Repair: £120-250
Intec 50CS Repair: £120-250

Source

Alpha 34 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