Electrolux Cooktop Error Code 21

Error code 21 on an Electrolux cooktop signals that the timer or a key sensor on the right side Touch Control Board is defective or sending an abnormal signal. The cooktop's control system has detected that the touch interface is not functioning as expected. This can be caused by a wiring issue or a failure within the Touch Control Board itself.

Resetting the cooktop by cutting power at the breaker and restoring it may temporarily clear the display, but if the underlying fault in the timer or key sensor circuit remains, the code will return. A reset does not fix a defective Touch Control Board or a damaged cable. Proper diagnosis and repair of the faulty component are needed for a permanent resolution.

Repair costs vary depending on whether the issue is a wiring connection problem or a full Touch Control Board replacement. If only cable reseating or minor wiring repair is needed, labor costs are typically lower. If the right side Touch Control Board requires replacement, total costs including parts and labor generally range from around $150 to $400 or more, depending on your location and the specific model.

Some of the initial diagnostic steps, like cleaning the cooktop surface or checking for visible cable damage, can be done by a confident DIYer. However, accessing and inspecting internal wiring harnesses and replacing the right side Touch Control Board requires disassembling the cooktop, which involves working near electrical components. If you are not comfortable with appliance disassembly and basic electrical safety, a qualified technician should perform the repair.

Operating the cooktop with an active error code 21 is not recommended. A defective key sensor or timer circuit can result in unresponsive controls, making it difficult to adjust or turn off cooking zones reliably. Continued use under these conditions poses a potential safety risk and may cause additional damage to the control system.