Wolf Microwave Error Codes

7 error codes for Wolf microwave models. Each links to the full diagnostic procedure from the service manual.

CodeDescription

09.E.03Issue with the thermistor; the internal temperature stays below 100°F (40°C)…09.E.41Temperature is measured every 32 seconds and a sudden rise in temperature is…38.E.03Issue with the humidity sensor; the humidity in the appliance is not being…39.1.03Damper error ERRORDisplayed when the AH (Absolute Humidity) sensor cannot balance its bridge…KEY OKDisplayed during touch control panel assembly test indicating all keys on the…NGDisplayed during touch control panel assembly test indicating one or more keys…

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09.E.03 on my Wolf Microwave

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Issue with the thermistor

From Service Manual 739112, p.44:

1.Check the electrical connections and the resistance of the thermistor.

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 WP8577274

Temperature thermistor

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