E69-243 Emergency

Ideal E69-243 Fault Code

Also written as E69243 — same fault.

The Ideal E69-243 fault code means: your boiler has detected an issue with the seal around the observation window, which could lead to unsafe gases escaping into your home.. It appears on 6 Ideal models 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: Window (glass+rubber frame)
Typical repair cost £120-200 (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 E69-243 fault code

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

Source

Ideal E69-243 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