In many Thermador models, especially built-in column systems, a non-cooling issue despite power and lights often points to a failed inverter board or a malfunctioning temperature sensor. Since Thermador units use variable-speed compressors, failure may occur silently, without the typical relay clicking seen in basic models. A diagnostic check via the control interface can help isolate whether the issue lies in the compressor control or sensor circuit.

If you're noticing moisture buildup around the doors or gaskets, it could be due to improper leveling or a failing perimeter heater. Thermador refrigerators rely on heated door frames in certain models to prevent condensation, especially in high-humidity environments. If that system fails or the unit is tilted slightly forward, water droplets may appear, eventually leading to mold or odor issues.

Thermador's custom ice systems can suffer from irregular ice production, particularly in column models with under-door bins. Hollow or small cubes are usually a sign of low water pressure or a partially frozen fill tube. Additionally, the internal filter may be clogged or outdated. Resetting the ice system and flushing the line often restores normal function, but sensor recalibration might be required.

In dual evaporator Thermador units, if the fridge feels warm while the freezer is cold, the issue is often linked to a failed evaporator fan or airflow damper. These fans operate silently, and failure can go unnoticed until food starts to spoil. Removing rear interior panels and checking airflow behind the drawers helps verify fan operation. Technicians may need to replace the fan motor or the damper control module.

Thermador refrigerators show diagnostic error codes on the front display when internal components fail or disconnect. Code E24 usually signals a freezer defrost issue, while E01 may indicate a communication failure between control boards. These units use Bosch-based control systems, which allow for precise diagnosis but often require factory-trained support to interpret and reset.

LED lighting in Thermador models is elegantly designed but sensitive to voltage fluctuations. Flickering or dimming may be caused by failing LED driver boards or internal capacitor fatigue. In column units, a failing soft-start circuit may also affect how lights engage during door opening. Replacing the light module or control board usually restores proper brightness.

If your Thermador fridge seems to never shut off or runs in short, frequent cycles, it may indicate a calibration issue with the control board, or an internal leak in the sealed system. Thermador units rely on finely tuned thermistors and inverter boards to regulate cooling. Reprogramming or replacing the logic board and testing refrigerant pressure helps restore normal cycling.