Siemens Refrigerator Error E18

⚡ Quick Answer: The Siemens refrigerator E18 error indicates a malfunction in the temperature sensor, leading to inaccurate temperature readings and potential cooling... ✅ DIY Fixable

What Does Error E18 Mean?

The Siemens refrigerator E18 error indicates a malfunction in the temperature sensor, leading to inaccurate temperature readings and potential cooling issues. This error often manifests with the display showing E18 while the fridge is running, and the actual internal temperature not matching the displayed temperature. The refrigerator may struggle to maintain a stable cooling environment, which can result from a faulty NTC temperature sensor or issues with the sensor wiring harness.

Common Symptoms:

  • Display shows E18 while fridge is running
  • Actual internal temperature does not match displayed temperature
  • Refrigerator may struggle to maintain proper cooling

Possible Causes

  • Faulty or out‑of‑range temperature sensor (NTC) (medium)
  • Sensor wiring harness issues (short, crushed wire) (medium)

How to Fix Error E18

DIY Fix Check temperature readings and reset fridge

  1. Place an accurate independent thermometer inside the refrigerator and freezer compartments.
  2. Compare the thermometer readings with the fridge’s displayed temperatures.
  3. Power off the refrigerator (unplug) for 5–10 minutes and restart to clear transient errors.

Technician Only Inspect and test temperature sensors and wiring

  1. Disconnect power to the refrigerator.
  2. Access the temperature sensors (NTC) in the fridge and freezer compartments.
  3. Measure sensor resistance at known temperatures and compare to manufacturer specs.
  4. Inspect and test sensor wiring and connectors for shorts, breaks, or damage.
  5. Replace any sensor or wiring found out of tolerance or damaged.

Parts needed: Temperature sensors (NTC), Sensor wiring harness

🛑 When to Call a Pro:
  • If error persists after basic reset and temperature checks
  • If sensors or wiring cannot be tested safely by the user
  • If refrigerator temperature remains unstable despite sensor replacement

Technical Specifications

wattage 20W
component Evaporator Fan Motor
resistance 30-50 ohms
part_number Siemens 00620680
voltage_rating 230V AC

Common Questions

What does E18 error mean on siemens refrigerator?

E18 indicates a temperature sensor malfunction, causing inaccurate temperature readings and cooling issues.

Can I fix siemens refrigerator E18 error myself?

Yes, you can check temperature readings, reset the fridge, and compare with an accurate thermometer.

How much does it cost to fix E18 error?

The estimated repair cost for the E18 error is medium, covering parts and labor.

When should I call a technician for E18?

Call a technician if the error persists after a reset or if sensors cannot be safely tested.

Data last verified: 2026-01-25

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