BoilerFaultCodesVokera E19 Fault Code
The Vokera E19 fault code means: your boiler has detected that the water returning from your radiators is getting too hot, indicating a possible circulation or sensor issue.. It appears on 1 Vokera model in our database.
Technical description: Return sensor temperature exceeded
What causes the Vokera E19 fault?
This fault occurs when the boiler detects that the water returning from your radiators is nearly as hot as the water leaving the unit, meaning heat isn't being transferred into your rooms. The most common reasons are a blockage in the system, a failing pump that isn't moving the water fast enough, or a faulty sensor providing an incorrect temperature reading.
This issue is more common when turning the heating back on after summer, as pump components can seize or sludge can settle during long periods of inactivity.
DIY fix possible
Check that all radiator valves (TRVs) are fully openEnsure the boiler pressure is between 1.0 and 1.5 barRestart the boiler using the reset dial
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Vokera models that show the E19 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera E19 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 7 July 2026