Thermador Cooktop Error Code E8203

E8203 means the cooking sensor has detected an overheating condition in the cooking module. As a protective response, the cooktop automatically shuts off the affected hobs to prevent damage to internal components. The error points to an issue with sensor positioning, cookware compatibility, or a fault within the sensor or control system itself.

The cooktop shuts off the hobs automatically when E8203 triggers, which is the intended safety response. You should not attempt to bypass this shutoff or continue cooking until the root cause is identified. Using the cooktop while an overheating condition exists could cause damage to the cooking module or pose a safety risk.

If the fix is simply repositioning the cooking sensor, there is no parts cost involved. If the cooking sensor itself needs replacement, parts and labor typically range from around $150 to $400 depending on your location and service provider. A control board replacement, if required, is a more involved repair and can range from $300 to $700 or more including labor.

Start by checking the position of the cooking sensor against your pot, following the exact placement instructions in your cooktop's manual. Make sure your cookware is flat, properly sized for the hob zone, and compatible with the sensor contact area. If repositioning the sensor does not resolve the issue, the sensor itself or the control board may need to be tested and possibly replaced by a qualified technician.

A power reset may temporarily clear the E8203 error and allow the cooktop to restart, but if the underlying cause is not corrected, the code will return once the overheating condition is detected again. Address the sensor positioning or cookware issue before resetting. If the error returns immediately or repeatedly, a component fault is likely and professional diagnosis is needed.