Thermador Oven Error Code E201 or E204

If you encounter Thermador oven error codes E201 or E204, it typically indicates a lower oven temperature sensor failure. While this may seem like a complex issue, you can troubleshoot and potentially resolve it by following these steps. Before you begin, make sure to disconnect electrical power to the oven to ensure your safety.

Step 1: Inspect the Lower Oven Temperature Sensor Wire Harness

Start by checking the lower oven temperature sensor wire harness. Over time, connections may become loose or damaged, leading to error codes. Inspect the wire harness carefully for any loose wires or visible damage.

• Reconnect any loose wires securely. If the wire harness is damaged beyond repair, it’s advisable to replace it with a new one.

Step 2: Test the Lower Oven Temperature Sensor Resistance

To further diagnose the issue, you can use a multimeter to check the resistance of the lower oven temperature sensor. Here’s how to do it:

• Set your multimeter to measure resistance (ohms).
• Disconnect the wires from the temperature sensor.
• Place the multimeter probes on the sensor terminals. You should measure approximately 1,080 ohms of resistance at a temperature of 70 degrees Fahrenheit. If the reading significantly deviates from this value, it’s an indication that the sensor is faulty.

Step 3: Replace the Lower Oven Temperature Sensor

If your multimeter reading indicates a faulty sensor, it’s time to replace the lower oven temperature sensor. You can order a compatible replacement part for your Thermador oven.

Step 4: Check the Electronic Oven Control Board

If both the sensor resistance and wire harness appear to be in good condition, the culprit may be the electronic oven control board. This is a more complex component, and replacement may require the expertise of a professional technician.

In summary, when facing Thermador oven error codes E201 or E204, it’s essential to follow these systematic steps to diagnose and resolve the issue. Start with inspecting the wire harness, then test the sensor resistance, and if needed, replace the sensor. If the problem persists, it may be related to the electronic oven control board, and professional assistance may be necessary.