BoilerFaultCodesVokera E38 Fault Code
The Vokera E38 fault code means: your boiler has experienced an internal communication error or hardware failure within its control system, causing it to shut down for safety.. It appears on 2 Vokera models in our database.
Technical description: Internal fault
What causes the Vokera E38 fault?
This fault occurs when the boiler's internal computer system suffers a communication breakdown, meaning the various components can no longer talk to each other correctly. It is usually caused by a hardware failure within the main control board or damage to the connecting wires that carry signals throughout the unit. Because the boiler can no longer verify that it is operating safely, it will shut down immediately to prevent any damage.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Vokera models that show the E38 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E38 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