⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.
Error Code: F21 Difficulty: Hard
Problem: Motor-related fault, often due to a malfunctioning tachogenerator.
How to Fix F21 Error (Step-by-Step)
- Unplug the dryer from the wall outlet to ensure your safety.
- Remove the top panel of the dryer, usually held by screws at the back.
- Take off the control panel and front panels to access the dryer’s internal components. Keep all screws organized.
- Carefully lift and remove the dryer drum to expose the motor assembly at the bottom rear of the machine.
- Locate the tachogenerator (a small component with wires) on the end of the motor. Disconnect its wiring harness and remove the screws holding it in place.
- Install the new tachogenerator, ensuring it is securely screwed in and the wiring harness is reconnected properly.
- Reassemble the dryer by reinstalling the drum, front panels, control panel, and top panel in the reverse order you removed them.
- Plug the dryer back in and run a test cycle to confirm the F21 error is cleared.
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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