BoilerFaultCodesPotterton Case sensor Fault Code
Also written as CASESENSOR — same fault.
The Potterton Case sensor fault code means: your boiler has detected a faulty connection to a safety sensor responsible for monitoring the outer casing, which will prevent the heating and hot water from turning on.. It appears on 2 Potterton models in our database.
Technical description: Sensor failed open or closed circuit
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 sensor fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Case sensor 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