BoilerFaultCodesPotterton 50 Fault Code
The Potterton 50 fault code means: your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, and it has likely shut down as a safety precaution.. It appears on 1 Potterton model in our database.
Technical description: Temperature sensors faulty (DHW and CH sensors)
What causes the Potterton 50 fault?
This fault occurs when the sensor inside the flue detects that the exhaust gases are getting too hot, or if the sensor itself has failed and is sending incorrect data to the control board. It acts as a vital safety trip to prevent the boiler from overheating and damaging internal components. Common causes include a buildup of debris in the heat exchanger or a simple electrical failure within the sensor's internal wiring.
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 50 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton 50 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