BoilerFaultCodesVokera 72 Fault Code
The Vokera 72 fault code means: your boiler is having trouble reading the temperature of the water returning to it, which means it has stopped working to prevent potential damage.. It appears on 4 Vokera models in our database.
Technical description: return NTC error (2nd CH)
What causes the Vokera 72 fault?
This fault occurs when the boiler's internal sensors detect an inconsistent temperature reading or a slow rate of water flow through the system. This is often caused by a buildup of debris or lime scale within the heat exchanger, or a sensor that is starting to fail and providing inaccurate data. Much like a safety check, the boiler pauses briefly to ensure it doesn't overheat before attempting to fire up again.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Vokera models that show the 72 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera 72 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