BoilerFaultCodesVokera E26 Fault Code
The Vokera E26 fault code means: your boiler has shut itself down as a safety precaution because it has detected an internal fault or overheating.. It appears on 1 Vokera model in our database.
Technical description: REFLO TOO HIGH ERROR Temperatura misurata non corretta
What causes the Vokera E26 fault?
This fault occurs when the boiler's internal temperature exceeds safe limits, triggering a shutdown to protect the unit from damage. The most common reasons are a lack of water flow due to a failing pump, a blockage in the heat exchanger, or a faulty sensor sending incorrect temperature readings to the control board.
This issue is more frequent during the first cold snap of winter when a pump that has been idle all summer suddenly seizes or struggles to circulate water through the system.
DIY fix possible
Locate the reset button or selector switch on the control panelTurn the selector to the 'OFF/RESET' position and wait for 10 secondsTurn the selector back to the 'ON' position and check if the boiler fires up
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Gas Safe Register →Vokera models that show the E26 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E26 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