Bosch Refrigerator Error E04

⚡ Quick Answer: The Bosch refrigerator E04 error code indicates a potential malfunction in the temperature sensor, leading to abnormal temperature readings and incons... ✅ DIY Fixable

What Does Error E04 Mean?

The Bosch refrigerator E04 error code indicates a potential malfunction in the temperature sensor, leading to abnormal temperature readings and inconsistent cooling performance. Users may notice the E04 code on the fridge/freezer interface, abnormal temperature readings, and possible alarm beeping. Additionally, the ice maker may stop functioning or the ejector may fail to turn, suggesting issues with the ice maker assembly or ambient temperature sensor.

Common Symptoms:

  • Error code E04 displayed on fridge/freezer interface
  • Abnormal temperature readings or alarm beeping (reported in freezer context)
  • Ice maker stops functioning or ejector doesn’t turn (reported in ice maker context)

Possible Causes

  • Ambient or room temperature sensor fault (community reports) (medium)
  • Ice maker motor/ejector drive fault (community reports) (medium)

How to Fix Error E04

DIY Fix Basic visual inspection and reset

  1. Disconnect power to the refrigerator for at least 5 minutes and reconnect to see if the E04 clears (general reset advice consistent with Bosch manuals for other codes).
  2. Check that refrigerator doors are fully closed and seals intact (helps eliminate unrelated alarms).
  3. Inspect the ice maker area for visible jams or stuck ice cubes.

Technician Only Test and replace temperature/ambient sensor or ice maker assembly

  1. With power off, locate and test the ambient/temperature NTC sensor for continuity; replace if defective (for E04 ambient sensor interpretation).
  2. Inspect wiring/connectors related to the sensor or ice maker for corrosion or damage.
  3. If symptoms point to the ice maker (no ice ejection and code appears), remove and inspect the ice maker motor/ejector module and replace if gears or motor are failed.

Parts needed: Ambient/temperature NTC sensor, Ice maker assembly (motor/ejector module)

🛑 When to Call a Pro:
  • If the error persists after basic reset and visual checks.
  • If you are not comfortable safely accessing internal sensors or ice maker components.

Technical Specifications

wattage
component Temperature Sensor
resistance 5-10 kOhms
part_number 00438066
voltage_rating 120V AC

Common Questions

What does E04 error mean on bosch refrigerator?

E04 indicates a malfunction in the temperature sensor, causing abnormal temperature readings and cooling issues.

Can I fix bosch refrigerator E04 error myself?

Yes, you can perform a basic reset by disconnecting power for 5 minutes and check for visible jams in the ice maker.

How much does it cost to fix E04 error?

Repair costs for the E04 error typically range from medium to high, depending on parts and labor.

When should I call a technician for E04?

Call a technician if the error persists after a reset or if you're uncomfortable accessing internal components.

Sources & References

Data last verified: 2026-01-16

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