How much does it cost to fix Ideal error code 68 H......4.......?

Typical repair cost for the Ideal 68 H......4....... fault is £90-180 including labour.

68 H......4....... High

Ideal 68 H......4....... Fault Code

Q: What does the Ideal 68 H......4....... fault code mean?

Your boiler has detected that a sensor monitoring the temperature of the exhaust gases is not working correctly, causing the system to shut down for safety.

Also written as 68H4 — same fault.

The Ideal 68 H......4....... fault code means: your boiler has detected that a sensor monitoring the temperature of the exhaust gases is not working correctly, causing the system to shut down for safety.. It appears on 2 Ideal models in our database.

Technical description: FLUE THERMISTOR ERROR

Typical repair cost £90-180 (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 68 H......4....... fault code

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

Source

Ideal 68 H......4....... 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