Thermador Refrigerator Error E20

⚡ Quick Answer: The Thermador refrigerator E20 error code indicates a malfunction related to the evaporator fan or a defrost drain issue. Symptoms often include water... ✅ DIY Fixable

What Does Error E20 Mean?

The Thermador refrigerator E20 error code indicates a malfunction related to the evaporator fan or a defrost drain issue. Symptoms often include water leaking inside the refrigerator compartment, unusual noises, and potential cooling problems. This error may arise from an obstruction in the defrost drain or a communication fault between control modules, affecting the refrigerator's operation.

Common Symptoms:

  • E20 displayed on control panel
  • Water leaking inside refrigerator compartment or at rear
  • Possible drainage issues or frozen drain
  • Refrigerator cooling may be affected due to defrost/communication faults

Possible Causes

  • Defrost drain obstruction or related drain system fault (medium)

How to Fix Error E20

DIY Fix Inspect and clear the defrost drain

  1. Unplug the refrigerator from power before working on it.
  2. Access the defrost drain area (typically behind a rear freezer panel) per your model’s manual.
  3. Use warm water and tools like a turkey baster to flush the defrost drain to clear ice/debris.
  4. Ensure water flows freely into the drain pan.
  5. Check for any visible ice buildup; if present, gently melt with low heat tools as safe.
  6. Restore power and observe if E20 clears and water leakage stops.

Technician Only Check control module communication and wiring

  1. Verify secure, undamaged wiring harnesses between the display/control panel and the power/control modules.
  2. Test continuity of wiring and connectors related to the display and main control modules.
  3. Use service diagnostic tools to confirm if communication faults exist between modules.
  4. Replace faulty wiring or modules as needed per manufacturer service documentation.

Parts needed: wiring harness, display/control module, power/control module

🛑 When to Call a Pro:
  • Water continues leaking after basic drain clearing
  • Error persists after flushing drain and checking simple connections
  • Signs of major electrical or control board faults
  • Uncertain how to safely access internal components

Technical Specifications

wattage 15W
component Evaporator Fan Motor
resistance 30-50 ohms
part_number 00724464
voltage_rating 120V AC

Common Questions

What does E20 error mean on Thermador refrigerator?

E20 indicates a malfunction in the evaporator fan or defrost drain, often causing leaks and cooling issues.

Can I fix Thermador refrigerator E20 error myself?

Yes, you can clear the defrost drain using warm water and tools after unplugging the refrigerator.

How much does it cost to fix E20 error?

$150 to $500+, depending on parts and labor required for repairs.

When should I call a technician for E20?

Call if water leaks persist after basic fixes, or if there are signs of major electrical faults.

Sources & References

Data last verified: 2026-03-25

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