GE Range Error Code FA40

FA40 indicates a generator board error in the induction cooktop system. The generator boards are the power electronics that convert line voltage into the high-frequency current needed to drive the induction cooking zones. When the control system cannot confirm proper operation from one or both boards, it displays FA40 and disables the cooktop. The repair requires replacing both generator boards.

A power reset, such as unplugging the range or tripping its circuit breaker for a few minutes, may temporarily clear the displayed code. However, if the generator board hardware is genuinely faulty, the FA40 error will return as soon as the cooktop attempts to operate. A reset alone does not address the underlying component failure.

Repair costs depend on part pricing and local labor rates, but replacing both induction generator boards is typically a moderately expensive repair. Parts costs for the two boards can range from roughly $150 to $400 or more depending on the specific model, and professional labor adds additional cost. It is worth comparing the repair estimate against the age and overall condition of the range before committing to the repair.

This repair involves high-voltage components and is best handled by a qualified appliance technician. The generator boards operate at dangerous voltage levels and must be fully de-energized and discharged before any service work begins. A technician will replace both cooktop generator boards and verify the induction system is functioning correctly before returning the unit to service.

The induction cooktop zones should be considered non-functional and unsafe to rely on while FA40 is active. The error indicates a fault in the core power electronics of the cooktop. If your range also has a gas or electric oven, that section may still be usable, but the induction surface should not be operated until the generator boards have been replaced and the fault is cleared.