Case temperature Emergency

Potterton Case temperature Fault Code

Also written as CASETEMPERATURE — same fault.

The Potterton Case temperature fault code means: your boiler has detected that it is becoming dangerously hot inside its outer shell and has switched itself off to prevent damage or fire risk.. It appears on 1 Potterton model 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: Temperature within boiler casing too high See chart
Typical repair cost £120-250 (including labour)

Engineer required

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

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Potterton models that show the Case temperature fault code

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

Source

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

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