How much does it cost to fix Alpha error code F0?

Typical repair cost for the Alpha F0 fault is £90-150 including labour.

F0 High

Alpha F0 Fault Code

Q: What does the Alpha F0 fault code mean?

Your boiler's electronic settings do not match the physical flue pipe installed, needing a quick adjustment to confirm the pipe length is set correctly for your home.

The Alpha F0 fault code means: your boiler's electronic settings do not match the physical flue pipe installed, needing a quick adjustment to confirm the pipe length is set correctly for your home.. It appears on 6 Alpha models in our database.

Technical description: Flue length parameter - should be changed for flue lengths over 4.5 m

Typical repair cost £90-150 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Alpha models that show the F0 fault code

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

Source

Alpha F0 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