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Error code reference
Bosch Dryer Error Code 3
NTC R2 fault-Cupboard dry LED flashes in the progress indicator, indicating an NTC thermistor fault for NTC R2 (heater air temperature sensor).
SourceBosch Tumble Dryer - Service Manual: WTA34/WTA35 SeriesPage 7 (Section V)
Diagnostic procedure
The full 3 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Test NTC R2, cable, and plug-and-socket connection (same procedure as Error 1).
SourceBosch Tumble Dryer - Service Manual: WTA34/WTA35 SeriesPage 7 (Section V)
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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