BoilerFaultCodesViessmann F58 Fault Code
The Viessmann F58 fault code means: your boiler has lost the connection to the temperature sensor that tells it when your hot water cylinder needs heating, so it has stopped heating your water to prevent potential overheating.. It appears on 1 Viessmann model in our database.
Technical description: No DHW heating Lead break, cylinder temperature sensor (gas system boiler)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Viessmann models that show the F58 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann F58 fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026