BoilerFaultCodesVokera E 19 Fault Code
Also written as E19 — same fault.
The Vokera E 19 fault code means: your boiler has detected that the water returning to it from your radiators is too hot, causing the system to shut down to prevent damage.. It appears on 1 Vokera model in our database.
Technical description: Return sensor temperature exceeded
What causes the Vokera E 19 fault?
This fault occurs when the boiler detects that the water coming back from your heating system is at an unsafely high temperature. The most common reasons are a blockage in the pipes, a faulty pump that isn't moving water fast enough, or a sensor that has developed a technical fault and is giving a false reading.
This issue often appears at the start of winter when the heating is turned on for the first time after summer, as internal pump parts can seize during long periods of inactivity.
DIY fix possible
Check that at least two or three radiators have their valves fully openEnsure your magnetic system filter is clean and not blockedCheck if the pump is running or if there is a blockage in the pipework
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Gas Safe Register →Vokera models that show the E 19 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E 19 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