BoilerFaultCodesVokera E43 Fault Code
The Vokera E43 fault code means: your boiler has stopped working because it cannot get a temperature reading from the main pipe where hot water leaves the unit.. It appears on 1 Vokera model in our database.
Technical description: Outlet probe with contact open
What causes the Vokera E43 fault?
This fault occurs when the boiler's control board loses communication with the sensor responsible for monitoring the temperature of the water leaving the unit. The most common reason is that the sensor has developed an internal electrical failure or the wiring connecting it to the main circuit board has become loose or damaged. Without this data, the boiler shuts down as a safety precaution 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 E43 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E43 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