BoilerFaultCodesSaunier Duval 32 Fault Code
The Saunier Duval 32 fault code means: your boiler has identified a faulty sensor that monitors the temperature of the water returning to the system, causing the unit to stop heating as a safety precaution.. It appears on 2 Saunier Duval models in our database.
Technical description: The heating return thermistor is short circuited.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Saunier Duval models that show the 32 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Saunier Duval 32 fault code information on this page is sourced and cross-checked against the official Saunier Duval service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026