How much does it cost to fix Grant error code Boiler Fault Finding 10?

Typical repair cost for the Grant Boiler Fault Finding 10 fault is £150-350 including labour.

Boiler Fault Finding 10 Emergency

Grant Boiler Fault Finding 10 Fault Code

Q: What does the Grant Boiler Fault Finding 10 fault code mean?

Your boiler is struggling to clear exhaust gases effectively when it tries to start, which can lead to smoke or fumes leaking out.

Also written as BOILERFAULTFINDING10 — same fault.

The Grant Boiler Fault Finding 10 fault code means: your boiler is struggling to clear exhaust gases effectively when it tries to start, which can lead to smoke or fumes leaking out.. It appears on 5 Grant models in our database.

Technical description: Fumes and puffing during starting (conventional flue). Check the condition of the chimney and air supply to the burner.

Typical repair cost £150-350 (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 →

Grant models that show the Boiler Fault Finding 10 fault code

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

Source

Grant Boiler Fault Finding 10 fault code information on this page is sourced and cross-checked against the official Grant service / installation manuals for each affected model.

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