BoilerFaultCodesVokera E 38 Fault Code
Also written as E38 — same fault.
The Vokera E 38 fault code means: your boiler is struggling to detect the temperature of the water coming into the unit, so it has shut down to prevent any damage.. It appears on 1 Vokera model in our database.
Technical description: Open circuit on inlet sensor
What causes the Vokera E 38 fault?
This fault occurs when the internal control board loses connection with the sensor that monitors the temperature of the water entering the boiler. The most common cause is a failure within the sensor's internal electrical components or a loose connection in the wiring that prevents the boiler from receiving a signal. Because the boiler no longer knows the temperature of the incoming water, it shuts down as a safety precaution to prevent 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 E 38 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E 38 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