Kenmore Range Error Code E77

E77 means the cooktop control board has detected a fault condition in one of the cooking zone pairs. It is the highest code in a series that runs from E11 through E77, with each code pointing to a specific zone pair monitored by the cooktop electronics. The control locks out normal operation when it detects an electrical condition outside acceptable parameters in that zone. Common causes include a failed heating element, a bad relay on the control board, or a loose wiring connection.

When E77 is active, the cooktop control has detected a problem and has interrupted operation in the affected zone pair as a protective measure. You should avoid attempting to use the affected burner zones until the fault is diagnosed and corrected. If you are unsure which zone is affected or if the entire cooktop is unresponsive, do not use the range until it has been inspected.

Repair costs depend on which component has failed. A replacement surface heating element typically runs in the range of $20 to $60 for parts. An element switch or infinite switch generally costs between $15 and $50. If the cooktop control board itself needs replacement, parts alone can range from $100 to $300 or more depending on the model, with additional labor costs if a technician performs the repair.

Pressing STOP and then cycling power at the circuit breaker will sometimes clear E77 if the fault was caused by a temporary electrical disturbance. However, if an actual component has failed in the affected cooking zone pair, the code will return after reset. A recurring E77 after multiple resets indicates a hardware fault that needs to be diagnosed and repaired before the cooktop is used again.

Start by pressing STOP to clear the display, then cut power at the breaker for a few minutes and restore it. If E77 returns, the affected cooking zone pair needs to be physically inspected. Check the surface heating element for visible damage and verify continuity, inspect the wiring harness connectors in that zone for looseness or corrosion, and test the element switch. If those components are intact, the cooktop control board relay for that zone may have failed and the board may need replacement.