Error code reference

Bosch Oven Error Code E104

Cavity 1 temperature sensor shorted

Cavity 1 temperature sensor shorted — sensor shorted to ground; cooling fan will operate at high speed and heating will stop.

First step from the service manual

Check wires and connections for pinch or short circuit to ground. Check resistance of temperature sensor; if sensor tests OK, could be control module problem; if sensor fails, replace sensor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
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E104 on my Bosch Oven

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Cavity 1 temperature sensor shorted — sensor

From Service Manual 974005, p.17:

1.Check wires and connections for pinch or short circuit to ground. Check resistance of temperature sensor; if sensor tests OK, could be control module problem; if sensor fails, replace sensor.

2.Disconnect the sensor and measure resistance at the sensor body. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).

3.Check the sensor harness for opens and shorts. Back-probe the sensor pins at the control board connector; a reading outside 5 kΩ to 50 kΩ indicates a failed sensor.

Part 00617955

Temperature sensor (NTC)

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First step from the service manual

Get the full diagnostic procedure for E104.

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