BoilerFaultCodesPotterton E07 Fault Code
The Potterton E07 fault code means: your boiler is unable to read the hot water temperature correctly, meaning you likely have no hot water or unstable water temperatures.. It appears on 2 Potterton models in our database.
Technical description: DHW sensor open circuit. Check cable/connections not damaged. Renew DHW cable/sensor assy. Part No. 5106290
What causes the Potterton E07 fault?
This fault occurs when the boiler's internal computer loses communication with the sensor responsible for measuring your tap water temperature. This is typically caused by the sensor's internal components failing due to age or the electrical wiring becoming brittle and snapping over time. Because the boiler no longer knows how hot the water is, it shuts down the hot water system as a safety precaution.
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 E07 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton E07 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