BoilerFaultCodesPotterton 10 Fault Code
The Potterton 10 fault code means: your boiler's temperature sensor for hot water has stopped working correctly, meaning your taps might not get warm or the temperature could be inconsistent.. It appears on 4 Potterton models in our database.
Technical description: Fault on Hot Water Sensor
What causes the Potterton 10 fault?
This fault occurs when the internal sensor responsible for monitoring your tap water temperature fails to send a reliable signal to the main control board. The most common reason is that the sensor's internal components have degraded over time due to constant heating and cooling cycles, or the electrical connection has become corroded. Because the boiler no longer knows how hot the water is, it stays off as a safety precaution to prevent scalding.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Potterton models that show the 10 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton 10 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