Thermador Range Error Code E3

E3 on a Thermador range means the oven temperature sensor is showing an open circuit condition, with resistance exceeding 5000 ohms. The sensor should normally read approximately 1050 ohms at 75°F. This fault prevents the control board from regulating oven temperature accurately, so the oven disables itself. The cause is typically a failed sensor probe, broken wiring, or a corroded connector.

You should not use the oven while E3 is active. Without a functioning temperature sensor, the control board cannot monitor or regulate oven heat, which creates a risk of uncontrolled overheating. The stovetop burners are on a separate circuit and are generally unaffected, but oven operation should be suspended until the sensor fault is resolved.

Resetting the range by cycling power at the breaker or unplugging it may temporarily clear the E3 code, but the error will return as soon as the control board checks the sensor circuit again. Because E3 indicates a hardware fault with resistance above 5000 ohms, the underlying sensor or wiring problem must be corrected before the code will stay cleared.

A knowledgeable DIYer can diagnose E3 by testing the sensor resistance with a multimeter at the probe terminals and along the wiring harness. If the sensor reads well above 1050 ohms at room temperature, replacement is straightforward and involves removing the probe from the oven cavity wall and disconnecting the harness. If the sensor tests correctly but the error persists, tracing the wiring harness for breaks or inspecting connectors requires more comfort working inside the appliance.

If the oven temperature sensor probe is the cause, replacement parts typically range from $30 to $80 depending on the specific model. If a technician performs the repair, total costs including labor generally fall between $100 and $250. Control board replacement, which is rarely needed for this code, would cost significantly more.