⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.
Error Code: E21 Difficulty: Hard
Problem: Communication error between the display control module and the ice and water dispenser control module.
How to Fix E21 Error (Step-by-Step)
- Unplug the refrigerator from the wall outlet to ensure your safety.
- Attempt a system reset by leaving the refrigerator unplugged for 10-15 minutes to allow the internal electronics to discharge, then plug it back in. If the error persists, proceed to the next step.
- Access the display control module, which is typically located behind the main user interface on the exterior of the refrigerator door. This may require carefully prying off a plastic cover or removing a few screws.
- Locate the ice and water dispenser control module, usually found inside the dispenser housing itself. You will likely need to remove the dispenser drip tray and front panel to access it.
- Carefully inspect the wiring harness that connects the display module to the dispenser module. Look for any pinched, frayed, or disconnected wires. Securely reconnect any loose plugs you find.
- If the wiring appears intact, one of the control modules has likely failed. It is recommended to replace the dispenser control module first. Disconnect the wire connectors from the old module, remove it from its mounting, and install the new one in its place.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Parts Availability Note: For this Electrolux/Frigidaire error code, exact OEM part numbers can vary by model revision and serial range. We’ve listed the most likely component(s), but confirm compatibility using your full model number before ordering. If no exact SKU is shown, use this guide for diagnosis first, then verify the matching OEM part on RepairClinic or PartSelect.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
Most DIY parts are $50–$250. If you have a quote, use the total.
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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