Official Thermador bottom-mount refrigerator parts

Common repair parts for Thermador bottom-mount refrigerators

• Door gasket. The refrigerator door gasket is a flexible seal that attaches to the outer edge of the refrigerator door to form an airtight seal around the door opening when the door is closed. The door gasket prevents warm, moist air from leaking into the refrigerator compartment.
• Ice maker. The ice maker is a complete assembly that contains the ice mold and the control device. It plugs into a wire harness in the freezer or the ice compartment. The ice maker receives water from the inlet water valve and then holds the water in the ice mold until the water is frozen solid. It then automatically ejects the ice and refills to continue the process until the ice storage bucket is detected as full.
• Temperature control board. The temperature control board is a circuit board that controls the major loads such as the compressor and fans. It receives input from the temperature sensors to determine when to run the compressor to start cooling. The temperature control board is mounted next to the compressor in the machine compartment, which is usually behind a panel on the back of the refrigerator.
• Water filter. The refrigerator water filter is installed in the filter housing and has carbon and/or other filter materials inside. It removes most sediment and other impurities from the water supplied to the refrigerator. Manufacturers recommend replacing the water filter every 3 to 6 months.

Diagnosing thermistor problems in your Thermador bottom-mount refrigerator

If the fresh food section of your refrigerator isn’t cooling properly, you could have a problem with the appliance’s thermistor or temperature sensor. The electronic control board monitors the thermistor and controls the refrigerator temperature based on thermistor signals. A broken thermistor could send the wrong information to the control board, resulting in a refrigerator temperature that’s too cold or not cold enough.

Check the thermistor resistance. For safety, unplug the refrigerator. Remove the thermistor cover to access the thermistor. Examine the thermistor's wire harness for damage or loose connections. If the wiring harness looks okay, check the resistance of the thermistor using a multimeter. Remove the thermistor and put the meter leads on the two white wires. The tech sheet for your refrigerator includes a temperature/resistance chart for the thermistor. You can usually find the tech sheet inside the refrigerator, stored behind the bottom front grill. Refer to this chart for the expected resistance readings for your model.

You'll need to replace the thermistor if its resistance doesn't match the expected resistance on the temperature/resistance chart.

If thermistor resistance is good, then you may need to replace the electronic control board.