GE Cooktop Error Code FA8

Error code FA8 on a GE induction cooktop indicates a fault in the induction driver circuit, specifically the IGBT (Insulated Gate Bipolar Transistor). The IGBT is the high-power switching component responsible for generating the high-frequency alternating current that flows through the induction coil beneath each cooking zone. This switching action creates the electromagnetic field that induces heat directly in compatible cookware. When the control board detects that the IGBT is operating outside acceptable parameters, or has failed entirely, it triggers the FA8 fault and disables the affected zone to prevent further damage or a potential safety hazard.

IGBT failures are typically caused by thermal stress from sustained high-power cooking cycles, inadequate ventilation beneath the cooktop, or power surge events that exceed the transistor's voltage and current ratings. A failed IGBT may present as a shorted component, an open circuit, or erratic switching behavior. In some cases, the surrounding driver circuitry on the induction tray assembly can also degrade, producing the same fault code even if the IGBT itself is not the sole failed component.

The primary diagnostic and corrective action for FA8 is replacement of the induction tray, which is the assembly that houses the IGBT, the induction coil driver board, and associated power components for one or more cooking zones. Because these components are integrated into the tray assembly rather than being individually serviceable in the field, the entire tray is replaced as a unit. Before replacement, technicians should also inspect the cooling fan operation and verify that ventilation pathways are clear, since chronic overheating is a leading cause of IGBT failure.