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
- 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).
- Check that refrigerator doors are fully closed and seals intact (helps eliminate unrelated alarms).
- Inspect the ice maker area for visible jams or stuck ice cubes.
Technician Only Test and replace temperature/ambient sensor or ice maker assembly
- With power off, locate and test the ambient/temperature NTC sensor for continuity; replace if defective (for E04 ambient sensor interpretation).
- Inspect wiring/connectors related to the sensor or ice maker for corrosion or damage.
- 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)
- If the error persists after basic reset and visual checks.
- If you are not comfortable safely accessing internal sensors or ice maker components.
Next step
Choose the next step for E04
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Thermistor
Measures precise temperature changes and sends resistance feedback to the control board.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Ice Maker Assembly
Automatically freezes and dispenses ice cubes inside the freezer compartment.
Model-compatible Refrigerator parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Refrigerator Condenser Coil Brush
For routine cleaning of accessible condenser areas where the manufacturer permits it. It does not repair a sealed-system or compressor fault.
Model-Compatible Refrigerator Water Filter
A routine replacement item on models with a water filter. Match the complete appliance model and existing filter number before ordering.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
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: 2026-07-25
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