ERROR CODE 6 High

Ideal ERROR CODE 6 Fault Code

Also written as ERRORCODE6 — same fault.

The Ideal ERROR CODE 6 fault code means: your boiler is currently unable to sense the temperature of your hot water tap supply, which means it has stopped heating water to prevent the system from getting too hot.. It appears on 1 Ideal model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: DHW THERMISTOR FAULT
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 ERROR CODE 6 fault code

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

Source

Ideal ERROR CODE 6 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 7 July 2026