Siemens Refrigerator Error E04

⚡ Quick Answer: The Siemens Refrigerator error E04 indicates a malfunction in the evaporator temperature sensor, causing temperature irregularities in both the refrig... ✅ DIY Fixable

What Does Error E04 Mean?

The Siemens Refrigerator error E04 indicates a malfunction in the evaporator temperature sensor, causing temperature irregularities in both the refrigerator and freezer compartments. This error may also lead to issues with the defrost system or cooling circuit, resulting in inconsistent cooling performance. Prompt attention to this error is essential to avoid food spoilage and maintain optimal appliance function.

Common Symptoms:

  • Error code E04 displayed on control panel
  • Temperature irregularities in refrigerator/freezer
  • Possible defrost irregular behavior

Possible Causes

  • Evaporator temperature sensor failure or misreading (medium)

How to Fix Error E04

DIY Fix Basic checks and reset

  1. Disconnect the refrigerator from power for several minutes to reset the control electronics.
  2. Ensure adequate ventilation around the refrigerator and that air paths inside are unobstructed.
  3. Check for excessive frost/ice buildup that may impair temperature sensing.

Technician Only Inspect and test temperature sensor and control components

  1. Remove interior panels to access the evaporator and its temperature sensor.
  2. Verify the evaporator NTC sensor is securely clipped to its proper location on the coil.
  3. Test sensor resistance against manufacturer specifications; replace if outside tolerance.
  4. Inspect wiring harness for damage from ice or movement; repair as needed.
  5. Check defrost circuit components and main control board if sensor and wiring are okay.

Parts needed: Evaporator temperature (NTC) sensor, Wiring harness/connectors, Defrost thermostat/heater (if applicable), Main control board (diagnosis only)

🛑 When to Call a Pro:
  • If the error persists after sensor and wiring checks
  • If internal diagnostics indicate defrost system or control board faults
  • If you are not comfortable working with refrigerant‑related components

Technical Specifications

wattage N/A
component Temperature Sensor
resistance 5-10 kOhms at 25°C
part_number Siemens 00620528
voltage_rating N/A

Common Questions

What does E04 error mean on Siemens Refrigerator?

E04 indicates a malfunction in the evaporator temperature sensor, leading to temperature irregularities.

Can I fix Siemens Refrigerator E04 error myself?

Yes, you can perform basic checks like resetting the appliance and inspecting for frost buildup.

How much does it cost to fix E04 error?

Repair costs vary; replacing the temperature sensor may be low-cost, while control board repairs can be higher.

When should I call a technician for E04?

Call a technician if the error persists after your checks or internal diagnostics indicate more severe issues.

Sources & References

Data last verified: 2026-01-25

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