How much does it cost to fix Ideal error code E 33?

Typical repair cost for the Ideal E 33 fault is £120-200 including labour.

E 33 High

Ideal E 33 Fault Code

Q: What does the Ideal E 33 fault code mean?

Your boiler has detected an electrical fault with the sensor that measures the temperature of your hot water tap supply, meaning it has temporarily switched off your hot water to prevent damage.

Also written as E33 — same fault.

The Ideal E 33 fault code means: your boiler has detected an electrical fault with the sensor that measures the temperature of your hot water tap supply, meaning it has temporarily switched off your hot water to prevent damage.. It appears on 1 Ideal model in our database.

Technical description: DHW thermistor short circuit

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 E 33 fault code

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

Imax W Repair: £120-200

Source

Ideal E 33 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