BoilerFaultCodesVokera E44 Fault Code
The Vokera E44 fault code means: your boiler has detected a fault with the sensor that monitors the water returning to the unit, causing the system to stop working for safety.. It appears on 2 Vokera models in our database.
Technical description: Return probe short-circuited
What causes the Vokera E44 fault?
This fault occurs when the sensor responsible for measuring the temperature of the water entering the boiler fails, typically due to an internal electrical short. The most common reason is regular wear and tear on the sensor's internal components, though it can also be triggered by moisture ingress or a damaged wiring connection. Because the boiler can no longer accurately monitor water temperature, it shuts down to prevent the system from overheating.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Vokera models that show the E44 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E44 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 27 April 2026