Thermador Refrigerator Error Code E06

E06 indicates that the fridge compartment evaporator temperature sensor has failed or is producing a signal outside the expected range. This code only appears during the refrigerator's auto diagnostic test, not during normal day-to-day operation. The evaporator sensor is a thermistor that the control board uses to monitor the cooling coil and manage defrost timing. A fault here can affect cooling efficiency if left unaddressed.

Because E06 only appears during a diagnostic test rather than during normal operation, the refrigerator may still be cooling when the code is found. However, a failed evaporator sensor means the control board is operating without accurate coil temperature data, which can lead to improper defrost cycles and eventual frost buildup. It is advisable to address the fault promptly to prevent food safety issues from developing as cooling performance degrades.

If only the evaporator thermistor needs replacement, parts and labor costs typically range from around $100 to $250 depending on the service provider and part availability. If the wiring harness requires repair or replacement, costs can range from $150 to $350. A control board replacement is the most expensive scenario and can range from $300 to $600 or more for parts and labor. Getting a diagnostic service call to confirm the root cause before committing to parts is generally worthwhile.

A knowledgeable DIYer can perform some steps, such as inspecting the sensor connector for corrosion, checking harness wires for visible damage, and manually defrosting the unit to rule out ice buildup. If the sensor itself has failed, replacing the evaporator thermistor is a moderately involved repair that requires accessing the evaporator coil behind the interior rear panel. If the control board is suspected, professional diagnosis is recommended before replacing that component.

A power reset may clear the code temporarily from the display, but if the evaporator sensor has physically failed or its wiring is damaged, the fault will return the next time the auto diagnostic test runs. Resetting alone does not repair the underlying hardware problem. A permanent fix requires identifying and replacing the defective component.