Thermador Refrigerator: compressor failure

Professional Repair Guide

What is this symptom?

Experiencing compressor failure in your Thermador refrigerator? The compressor may not run, leading to uncooled refrigerator and freezer compartments. You might hear clicking sounds or no noise at all. This issue often arises during normal operation when cooling unexpectedly stops, indicating potential internal faults.

Urgency: High

Important Tips for Thermador Models

Thermador troubleshooting identifies start relay/power issues and poor ventilation as specific factors for compressor not running

Possible Causes

Faulty start relay or overload protector

How to Identify: Compressor clicks repeatedly or tries to start but fails; refrigerator warm; no continuous run sound

Part: Start relay / overload protector

Overheating due to poor ventilation/dirty condenser coils

How to Identify: Excessive heat around compressor area; dirty coils; fridge in poorly ventilated location; compressor stops after long run periods

Part: Condenser coils, condenser fan

Internal compressor mechanical wear or failure

How to Identify: No start with no relay or electrical fault detected; compressor silent or humming constantly without running

Part: Compressor motor internal components

Refrigerant leaks resulting in compressor overwork

How to Identify: Poor cooling with abnormal pressure readings; oil residue around refrigerant lines

Part: Refrigerant system, compressor lubrication circuit

DIY Solutions

Check and clean condenser coils

Moderate 30-60 minutes

Tools Needed: Vacuum with brush attachment, screwdriver

Unplug refrigerator.
Locate condenser coils (usually at back or underneath).
Use brush/vacuum to remove dust and debris.
Restore power and observe cooling performance.

⚠️ Safety First: Unplug before cleaning to avoid electrical shock

Test and replace start relay/overload device

Advanced 30-60 minutes

Tools Needed: Multimeter, screwdriver, replacement start relay kit

Unplug refrigerator.
Remove rear panel to access compressor.
Remove start relay and test continuity with multimeter.
Replace start relay/overload if no continuity or signs of failure.
Reassemble and power on to test compressor start.

⚠️ Safety First: Working near compressor and electrical components carries shock risk; unplug refrigerator and consider professional help if unsure.

Professional Repairs

Compressor replacement

Estimated Cost: $400 - $1200+

Refrigerant leak repair and system recharge

Estimated Cost: $300 - $800+

Control board / power circuit repair

Estimated Cost: $200 - $600

When to Call a Professional

Compressor humming continuously without starting after relay replacement

Burnt smell or visible electrical damage

Refrigerant leak suspected (oil residue or pressure test confirmation)

No improvement after DIY coil and relay checks

Preventive Maintenance

Clean condenser coils: Overheating and compressor overwork
Frequency: twice per year
Ensure adequate ventilation: Heat buildup around compressor
Frequency: ongoing
Use surge protector: Voltage-related electrical damage
Frequency: continuous

Frequently Asked Questions

Why is my Thermador Refrigerator compressor failure?

Common causes include faulty start relays, overheating from dirty coils, and internal compressor wear.

How do I fix Thermador Refrigerator compressor failure myself?

Check and clean the condenser coils, or test and replace the start relay if necessary.

How much does it cost to fix compressor failure?

Professional repairs can range from $400 to over $1200, depending on the issue.

When should I call a technician for compressor failure?

Call a technician if DIY fixes don't work, or if you suspect a refrigerant leak.

References & Sources

Thermador Refrigerator Troubleshooting Official

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

Compressor overload due to dirty condenser coils
Faulty start relay preventing compressor from starting
Refrigerant leak causing insufficient cooling

User Suggested Solutions

Clean the condenser coils. Unplug the refrigerator, locate the coils (usually at the back or underneath), and use a vacuum or brush to remove dirt and debris. Plug the refrigerator back in and check if the compressor starts.
Replace the start relay. Unplug the refrigerator, locate the relay (usually on the compressor), and disconnect it. Replace it with a new relay and reconnect everything. Plug the refrigerator back in to see if the compressor starts.
Check for refrigerant leaks. This requires specialized tools and skills. If a leak is suspected, contact a professional technician to locate and repair the leak, and recharge the refrigerant.