What 21 Means
21 on the cooktop of an Electrolux induction range is a LIN (Local Interconnect Network) error: no communication or a shorted bus between the ESEC board and the induction power electronics. The manual checks the LIN harness at the ESEC P8 connector, then the ESEC board, then the filter circuit board.
Common Causes of 21
- LIN harness loose or damaged
- ESEC board failed
- Filter circuit board failed
🔧 One Safe Check You Can Try
Reset at the breaker for 30 seconds.
⚠ Why You Shouldn't Go Further Than That
- The harness runs between the console and the induction housing.
- Induction boards carry high voltages.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.