BoilerFaultCodesPotterton E06 Fault Code
The Potterton E06 fault code means: your boiler has detected an electrical fault with the sensor that monitors water flow, meaning it cannot safely determine if water is moving through the system.. It appears on 5 Potterton models in our database.
Technical description: Flow sensor short circuit. Check cable/connections not damaged. Renew sensor/cable. Check connections on control
What causes the Potterton E06 fault?
This fault occurs when the electrical signal from the water flow sensor is disrupted, usually due to a physical break or a short circuit in the wiring. The most common reason is moisture ingress damaging the sensor's internal electronics or vibrating wires rubbing against internal components until the insulation wears through. When this happens, the boiler shuts down because it can no longer verify if water is safely moving through the heat exchanger.
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 E06 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E06 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