BoilerFaultCodesVokera E041 Fault Code
The Vokera E041 fault code means: your boiler has detected that the water pressure is incorrect or the sensor that monitors it is not communicating properly.. It appears on 4 Vokera models in our database.
Technical description: Water transducer – check system water pressure
What causes the Vokera E041 fault?
This fault occurs when the boiler's internal sensor detects that there is not enough water pressure to operate safely. The most common reason is a slow leak somewhere in your central heating system or air being released from the radiators, which causes the pressure to drop below the required threshold. It can also be caused by the sensor itself becoming blocked with debris or failing electronically.
This issue often appears in autumn when the heating is turned on for the first time after summer, as natural pressure loss over several months becomes apparent.
DIY fix possible
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is too low, use the filling loop valves to top up the system until the gauge reaches 1.2 bar.Reset the boiler to see if the fault clears.
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Gas Safe Register →Vokera models that show the E041 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E041 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