How much does it cost to fix Heatline error code F27?

Typical repair cost for the Heatline F27 fault is £120-250 including labour.

F27 High

Heatline F27 Fault Code

Q: What does the Heatline F27 fault code mean?

Your boiler is failing to detect a flame, so it has purposefully shut down to prevent gas from building up inside the system.

The Heatline F27 fault code means: your boiler is failing to detect a flame, so it has purposefully shut down to prevent gas from building up inside the system.. It appears on 8 Heatline models in our database.

Technical description: Flame detection fault.

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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Heatline models that show the F27 fault code

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

Capriz Plus Repair: £120-250
Centurion 25 Repair: £120-250
Compact 24 Repair: £120-250
Compact 30 Repair: £120-250
Monza Repair: £120-250
Solaris Repair: £120-250
Vizo 24 Repair: £120-250
Vizo 28 Repair: £120-250

Source

Heatline F27 fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

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