BoilerFaultCodesVokera E45 Fault Code
The Vokera E45 fault code means: your boiler has lost connection with the sensor that monitors water returning from your radiators, meaning it cannot safely regulate its temperature.. It appears on 1 Vokera model in our database.
Technical description: Return probe with contact open
What causes the Vokera E45 fault?
This fault occurs when the boiler's control board stops receiving a signal from the sensor that monitors the temperature of the water coming back from your heating system. The most common cause is a failed internal sensor or a loose wire connection, which prevents the boiler from knowing if the system is overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Vokera models that show the E45 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E45 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026