How much does it cost to fix Ideal error code Flue gas overheat?

Typical repair cost for the Ideal Flue gas overheat fault is £150-£650 including labour.

Flue gas overheat High

Ideal Flue gas overheat Fault Code

Q: What does the Ideal Flue gas overheat fault code mean?

Your boiler has switched itself off because the internal gases have become too hot, which could damage the heat exchanger or seals.

Also written as FLUEGASOVERHEAT — same fault.

The Ideal Flue gas overheat fault code means: your boiler has switched itself off because the internal gases have become too hot, which could damage the heat exchanger or seals.. It appears on 1 Ideal model in our database.

Technical description: Should there be a problem with the heat exchanger, thé flue gas overheat thermostat will trip to protect ihe non-metal seals, aiso illuminating the Overheat lamp.

Typical repair cost £150-£650 (including labour)

Engineer required

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

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Ideal models that show the Flue gas overheat fault code

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

Turbo2 24 Repair: £150-£650

Source

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

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