thermador refrigerator won't cool

Thermador refrigerators are so well-constructed that most cooling issues have a simple fix. Why is my Thermador refrigerator not cooling as it should? The temperature may need adjusting to be within the optimal cooling range. Try these Thermador refrigerator troubleshooting tips to quickly restore its cool.

Why Is My Thermador Refrigerator Not Cooling?

Outside power issues, lack of maintenance, and even part failures are all possibilities for a Thermador refrigerator not cooling properly. Here’s how to get to the root of the problem so your fridge functions properly.

Step #1 – Check Refrigerator Power

As basic as it may sound, a Thermador refrigerator won’t cool if it doesn’t have adequate power. The refrigerator requires consistent electricity to power the compressor as well as numerous other components. If you open the refrigerator door and the light doesn’t go on, the refrigerator likely doesn’t have power.

Here’s how to check your refrigerator’s power sources:

  • Inspect the power cord: Make sure the cord is free of damage and properly plugged into a functioning outlet. 
  • Avoid extension cords: These cords can’t safely conduct the voltage the refrigerator requires, resulting in surges that cut off power.
  • Check your home’s circuit breaker box: Look for tripped breakers, repositioning them as needed.
Thermador refrigerator troubleshooting

Step #2 – Check the Door Gaskets for Damage

The refrigerator’s door gasket is a rubber seal that runs along the door’s perimeter, providing airtight closure when the doors are closed. This seal keeps cool air contained and prevents warm air from entering. How can you tell if the gasket is compromised? A simple test can indicate if it’s functioning properly.

Try this simple trick to test your refrigerator gasket:

  1. Open the refrigerator door and position a dollar bill halfway inside.
  2. Close the door so half the dollar bill is visible.
  3. Pull on the dollar bill. If it releases easily, the gasket isn’t providing a proper seal.

If you find your Thermador refrigerator door not closing correctly, first make sure nothing is blocking the doors. If there are no obstructions, assess the gasket for damage like cracks, holes, or debris that can prevent proper closure. While a dirty gasket can be wiped clean with a damp cloth, it must be replaced if damaged.

Step #3 – Adjust Refrigerator Temperature

Sometimes, a Thermador refrigerator not cooling may need a simple temperature adjustment. Thermador recommends a refrigerator temperature setting of 37°F, while the freezer should be set at 0°F. If the temperature on the control panel is too high, the refrigerator likely isn’t cool enough to properly preserve food.

Check the temperature setting on the refrigerator’s control panel. If it’s too high, refer to your user manual to determine how to lower the temperature on your model refrigerator.

Step #4 – Clean Refrigerator Condenser Coils

A refrigerator’s condenser coils help cool the refrigerant, producing cool air for the refrigerator. If the coils get dusty or dirty, the refrigerant won’t adequately dissipate heat, overworking the compressor and increasing the refrigerator’s internal temperature. Regular condenser coil cleanings every 6-12 months can prevent cooling problems and ensure that the compressor functions optimally.

thermador refrigerator not cooling
Image from Appliance Blog

Here’s how to clean Thermador refrigerator coils:

  1. Refer to your user manual to locate the coils on your model refrigerator. Most are located behind an upper or lower front grille or behind a rear grille on the back of the refrigerator.
  2. Once the coils are visible, use an appliance brush to carefully brush them, removing all visible dust and debris.
  3. Use a vacuum’s narrow hose attachment to clean around the coils and remove any lingering dust and dirt. 
  4. Replace the grille.

Step #5 – Diagnose Faulty Parts

If all else fails, a faulty part may be responsible for your Thermador refrigerator not cooling properly. 

The following part failures require a professional refrigerator repair:

  • Failed fan motor: Both the condenser and evaporator fans help cool refrigerant as it flows. If either fan motor fails, the refrigerant won’t cool and the refrigerator’s temperature will rise. Check the fan blades and remove any visible obstructions. If there are no blockages and the fan motor shows no continuity with multimeter testing, it must be replaced.
  • Faulty start relay: This component signals the compressor when more cool air is needed. If it doesn’t function properly, the compressor may not run when needed or at all. If multimeter testing of the start relay shows no continuity, it requires replacement.
  • Broken temperature control thermostat: The thermostat monitors the refrigerator’s internal temperature, signaling the compressor and other components when it gets too warm. If the thermostat doesn’t make a clicking sound when rotated from the lowest to the highest setting, it’s likely broken and needs replacement.

The technicians at Twin Appliance can handle any Thermador appliance repair. Schedule your expert service today!

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Twin Appliances Inc.
818 W Florence Ave
Los Angeles, CA 90044
(323) 758-2442

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