Error code reference

Bosch Oven Error Code E302

Control module too hot: temperature sensor on the control module detects temperature higher than limit value; control turns off heating elements and fan defaults to high speed.

SourceBosch 800 Series Built-in Wall Ovens - Service Manualp. 32

Diagnostic procedure

The full E302 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
If cooling fan is not operating, check connections to the fan and the control module (see Small Load Schematic). If cooling fan is operating, check element operation, check for air obstruction or damaged upper/lower ventilation trims, and check for stuck relays.

SourceBosch 800 Series Built-in Wall Ovens - Service Manualp. 32

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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