Thermador Freezer: not cooling

Professional Repair Guide

What is this symptom?

Is your Thermador freezer running but failing to cool properly? This common issue may leave your food unfrozen and warming inside the compartment. Several factors could be at play, including dirty condenser coils, faulty fan motors, or incorrect temperature settings. Understanding these causes can help you identify the problem and restore your freezer's efficiency.

Urgency: High

Important Tips for Thermador Models

Thermador freezers share common refrigeration issues with other brands (e.g., coil and fan failures) but specific parts like start relays and evaporator fans have model-specific replacement parts
Official Thermador support offers general refrigeration troubleshooting but lacks detailed published steps for freezer cooling problems

Possible Causes

Dirty or blocked condenser coils

How to Identify: Dust buildup visible on coils; freezer runs continuously with insufficient cooling

Part: Condenser coils

Faulty evaporator or condenser fan motor

How to Identify: No airflow noise, freezer interior not circulating cold air even though compressor runs

Part: Evaporator fan, condenser fan motor

Faulty start relay or start device affecting compressor

How to Identify: Compressor does not reliably start or runs intermittently; clicking noises

Part: Start relay/start device

Incorrect temperature setting or power issue

How to Identify: Freezer set above recommended freezing temps; unit has lost power recently

Part: Control thermostat/settings

Damaged door gasket allowing warm air entry

How to Identify: Warm air entering around door edges; gasket cracks or gaps visible

Part: Door gasket/seal

DIY Solutions

Clean condenser coils

Moderate 20-40 minutes

Tools Needed: vacuum with brush attachment, coil cleaning brush

Unplug freezer and move away from wall.
Locate condenser coils at the back/bottom.
Use brush and vacuum to remove dust and debris.
Restore power and monitor cooling performance.

⚠️ Safety First: Always unplug before servicing coils.

Inspect and test freezer fans

Advanced 30-60 minutes

Tools Needed: screwdrivers, multimeter

Unplug unit and access fan areas.
Visually inspect fan blades for obstructions.
Spin fan manually to check movement.
Use multimeter to test motor continuity.
Replace fan motor if defective.

⚠️ Safety First: Risky electrical components; ensure power is off

Check and adjust temperature settings

Easy 5 minutes

Locate control panel.
Ensure temperature is set near recommended freezing range.
Wait 24 hours to assess temperature change.

Professional Repairs

Replace start relay or start device

Estimated Cost: $80 - $200

Replace evaporator or condenser fan motor

Estimated Cost: $100 - $300

When to Call a Professional

Compressor does not run after basic checks

Unusual noises (buzzing/clicking) indicating electrical or mechanical failure

Signs of refrigerant leak or sealed system failure

Preventive Maintenance

Clean condenser coils: Dust buildup leading to cooling inefficiency
Frequency: every 6 months
Inspect door gaskets: Warm air leaks reducing freezer cooling
Frequency: annually

Frequently Asked Questions

Why is my Thermador Freezer not cooling?

Common reasons include dirty condenser coils, faulty fan motors, incorrect settings, or damaged door gaskets.

How do I fix Thermador Freezer not cooling myself?

You can clean the condenser coils, check fan operation, or adjust the temperature settings.

How much does it cost to fix not cooling?

Professional repair costs range from $80 to $300, depending on the issue.

When should I call a technician for not cooling?

Call a technician if DIY solutions donâ€™t resolve the issue or if you suspect a more complex problem.

References & Sources

Troubleshooting Guide: Thermador Freezer Not Cooling Community

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

75%

DIY Success Rate Difficulty: Either

Common Issues Reported by Users

Dirty condenser coils
Faulty thermostat
Blocked air vents

User Suggested Solutions

Clean the condenser coils. Unplug the freezer, locate the condenser coils (usually at the back or bottom), and use a vacuum or brush to remove dust and debris. Plug the freezer back in and monitor the cooling performance.
Check and replace the thermostat if necessary. Locate the thermostat (usually inside the freezer), test it with a multimeter for continuity, and replace it if it's faulty.
Inspect and clear any blocked air vents. Ensure that there are no items obstructing the airflow inside the freezer. Rearrange items if necessary to allow for proper air circulation.