BoilerFaultCodesPotterton 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 2 Potterton models in our database.
Technical description: Temperature within boiler casing too high See chart
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 7 July 2026