How much does it cost to fix Grant error code Boiler Fault Finding 3?

Typical repair cost for the Grant Boiler Fault Finding 3 fault is £120-250 including labour.

Boiler Fault Finding 3 High

Grant Boiler Fault Finding 3 Fault Code

Q: What does the Grant Boiler Fault Finding 3 fault code mean?

Your boiler has failed to ignite even though it has power and fuel, so it has safely shut itself down to prevent any issues.

Also written as BOILERFAULTFINDING3 — same fault.

The Grant Boiler Fault Finding 3 fault code means: your boiler has failed to ignite even though it has power and fuel, so it has safely shut itself down to prevent any issues.. It appears on 5 Grant models in our database.

Technical description: Burner not starting - fuel and electricity supplies present. Press the reset button on the burner if lit on the control box.

Typical repair cost £120-250 (including labour)

Engineer required

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

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Grant models that show the Boiler Fault Finding 3 fault code

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

Source

Grant Boiler Fault Finding 3 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