How much does it cost to fix Intergas error code E36?

Typical repair cost for the Intergas E36 fault is £120-300 including labour.

E36 High

Intergas E36 Fault Code

Q: What does the Intergas E36 fault code mean?

Your boiler thinks it sees a flame even though it hasn't started the ignition process yet, which is a safety error that prevents the unit from firing up.

The Intergas E36 fault code means: your boiler thinks it sees a flame even though it hasn't started the ignition process yet, which is a safety error that prevents the unit from firing up.. It appears on 6 Intergas models in our database.

Technical description: Flame detected without gas valve opening

What causes the Intergas E36 fault?

This fault occurs when the boiler's internal sensors detect a flame signal at a time when the burner should be off. The most common reason is a malfunctioning ionisation electrode that is sending a false signal, or a fault within the main control board that is misinterpreting electrical interference as a flame. It can also be caused by moisture or carbon deposits building up on the ignition components, creating a 'leak' of electricity.

Typical repair cost £120-300 (including labour)

Engineer required

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

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Intergas models that show the E36 fault code

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

Source

Intergas E36 fault code information on this page is sourced and cross-checked against the official Intergas service / installation manuals for each affected model.

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