2 / C Emergency

Ideal 2 / C Fault Code

Also written as 2C — same fault.

The Ideal 2 / C fault code means: your boiler has detected that it is getting dangerously hot and has shut itself down to prevent damage or fire risk.. It appears on 1 Ideal model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Safety sensor of the heat exchanger is overheated.
Typical repair cost £150-300 (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 2 / C fault code

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

Source

Ideal 2 / C 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