Thermador Oven Error Code E201

E201 means the control board has detected an open circuit in the lower cavity temperature sensor (Cvt 2). The sensor is responsible for monitoring the temperature inside the lower oven cavity. Without a valid signal from this sensor, the oven cannot regulate heat safely and will display the fault code. The issue can be in the sensor itself, the wiring, or the connectors.

It is not recommended to use the lower cavity of the oven while E201 is active. Because the control board cannot read the lower cavity temperature, it cannot regulate heating safely, which creates a risk of overheating. The upper cavity may still function depending on your oven model, but the lower cavity should be considered inoperable until the fault is resolved.

Repair costs vary depending on the root cause. A replacement lower cavity temperature sensor typically costs in the range of $30 to $80 for the part, while professional labor for diagnosis and installation can add $100 to $250 or more depending on your location and service provider. If the control board is the cause, replacement costs are significantly higher and can range from $200 to $500 or more for the part alone.

A knowledgeable DIYer can start by checking the sensor connector for looseness or visible damage, which requires no special tools. Testing the sensor and harness with a multimeter is the next step and requires following the wiring diagram labeled Diagram 2/4. Replacing a sensor is a manageable repair for those comfortable working with appliance wiring, but any work involving the control board or internal harness is generally best left to a qualified technician.

A reset, such as cycling the circuit breaker or powering the oven off for several minutes, may temporarily clear the display. However, if the underlying fault with the lower cavity sensor or its wiring is not corrected, the E201 code will return when the oven powers back on and runs its diagnostic checks. A reset alone is not a repair and does not address the root cause.