Kenmore Dryer Error Code F-43

F-43 means the motor control board has detected that the incoming line voltage is lower than the acceptable operating range, an undervoltage warning. The dryer responds by continuing to run but locks the blower to a set speed. This code points to the electrical supply system rather than a mechanical failure. Diagnosing it requires checking line voltage using the built-in diagnostic mode and TEST #1.

A persistent undervoltage condition is worth taking seriously from a safety standpoint. High-resistance connections, which are a common cause of voltage drop, can generate significant heat at the terminal block or power cord and create a fire or shock hazard. Having a qualified technician inspect the power cord, terminal block, and circuit breaker connections is a reasonable precaution when this code appears.

The repair cost depends entirely on where the fault is found. If the issue is at the household circuit breaker, an electrician's service call typically runs between $100 and $250. Replacing a power cord generally costs between $20 and $60 for the part plus labor. A terminal block replacement is usually $15 to $40 for the part. If the motor control board turns out to be faulty, board replacement costs can range from $150 to $350 depending on the specific model and whether a technician is hired.

The dryer is designed to keep running when F-43 is active, operating the blower at a fixed speed rather than shutting down. However, running the dryer on a chronically low-voltage supply can stress the motor control board and other components over time. It is best to identify and correct the voltage issue promptly rather than continuing to use the dryer indefinitely under this condition.

Resetting the dryer may temporarily clear the code, but if the underlying voltage problem is still present the code will return during the next cycle or when the motor control re-evaluates the supply. A reset does not correct the root cause. The voltage supply, power cord, and connections need to be tested and repaired to resolve the condition permanently.