SUMP FAN FAILURE THERMOSTAT High

Ideal SUMP FAN FAILURE THERMOSTAT Fault Code

Also written as SUMPFANFAILURETHERMOSTAT — same fault.

The Ideal SUMP FAN FAILURE THERMOSTAT fault code means: your boiler has detected that a safety sensor near the fan or collection area has triggered because it has become too hot or has detected a block.. 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: Thermostat primarily for Turbo 2 24 models detecting fan/sump issues
Typical repair cost £140-£280 (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 SUMP FAN FAILURE THERMOSTAT fault code

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

Source

Ideal SUMP FAN FAILURE THERMOSTAT 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