BoilerFaultCodesPotterton E163 Fault Code
The Potterton E163 fault code means: your boiler has detected a problem with the sensor that monitors the temperature of your hot water, meaning you likely have no hot water or it is inconsistent.. It appears on 1 Potterton model in our database.
Technical description: Domestic hot water (DHW) negative temperature coefficient (NTC) sensor fault (s.c.) or DHW NTC sensor fault (o.c.)
What causes the Potterton E163 fault?
This fault occurs when the boiler's internal computer loses communication with the sensor that measures the temperature of your hot water. The most common reason is that the sensor has physically failed due to electrical wear, or the wiring connecting it to the main control board has become loose or damaged.
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 E163 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E163 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