Error Code: FLASHING “4” Difficulty: Hard
Problem: Door cable damage.
How to Fix FLASHING “4” Error (Step-by-Step)
- Unplug the refrigerator from the wall outlet to ensure your safety.
- Open the refrigerator door and locate the hinge cover at the very top of the unit. Remove the screws holding it in place and lift the cover off.
- Carefully disconnect the wire harness connector that is now exposed. This is the electrical connection for the door.
- Have a helper firmly hold the door. Use a socket wrench to remove the bolts securing the top hinge to the refrigerator cabinet.
- With your helper, carefully lift the entire door straight up and off the bottom hinge pin. Set the door aside on a soft, protected surface.
- Locate and replace the damaged door wiring harness inside the door assembly. You may need to carefully guide the new harness through the door’s internal channels.
- Re-install the door by lowering it onto the bottom hinge pin, re-attaching the top hinge, reconnecting the wire harness, and securing the hinge cover. Plug the refrigerator back in to test the repair.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
What to Check Next on This Bosch Refrigerator
Bosch Refrigerator Error FLASHING "4": Use the code or symbol as the starting clue, then confirm the actual symptom before ordering parts.
- Confirm the doors seal fully, vents are open, and temperatures have had enough time to stabilize after any setting change.
- Check for frost buildup, blocked airflow, fan noise, loose sensor wiring, and dirty condenser areas before replacing electronics.
- If the alarm or code returns, use the model number to test the matching sensor, fan, defrost, or control circuit instead of guessing at parts.
If the issue returns after these checks, match replacement parts to the complete Bosch model number from the appliance tag. The same code can point to different components depending on the exact model and when the failure appears.
Recommended Parts to Check
No exact official OEM part number is listed here because the correct Bosch refrigerator part can vary by complete model number. These are targeted part-category searches, not universal fit claims.
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Bosch refrigerator temperature sensorCommon replacement category: Temperature sensor / thermistorFit note: Exact OEM part number varies by full Bosch refrigerator model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for temperature, alarm, and cooling-sensor faults after the door seal, vents, and settings are checked. -
Bosch refrigerator evaporator fan motorCommon replacement category: Evaporator fan motorFit note: Exact OEM part number varies by full Bosch refrigerator model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for airflow, fan, and uneven-cooling symptoms after ice buildup and obstructions are ruled out. -
Bosch refrigerator electronic control boardCommon replacement category: Main electronic control boardFit note: Exact OEM part number varies by full Bosch refrigerator model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for repeated electronic, display, or cooling-control faults after connectors and power are checked.Search Amazon for Bosch refrigerator electronic control board
Before ordering: match the part to the complete Bosch refrigerator model number on the appliance tag.
When It’s Better to Replace Than Repair
Refrigerator repairs can become costly when sealed-system, control, defrost, fan, or ice-maker issues repeat.
Confirm width, height, depth, door swing, counter-depth needs, water line, and delivery path before ordering.
For repair parts, verify exact fit with the full refrigerator model number before buying; these links are general replacement-appliance shopping options.
- [OK]Water inlet valve, ice maker, or fan failures keep returning
- [OK]Defrost heater, thermostat, or sensor faults stack up
- [OK]Compressor or sealed-system repair is not economical
- [OK]Food-loss risk is becoming a pattern
Recommended Refrigerator Replacement Options
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Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Bosch error codes: Bosch Error Codes
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