Kenmore Washer Error Code F/28

F/28 indicates a serial communication error between the Central Control Unit (CCU) and the Motor Control Unit (MCU). These two boards must exchange data continuously for the washer to operate, and F/28 appears when that communication breaks down. The cause can range from a loose wire connector to a failed control board.

Unplugging the washer for a few minutes and restoring power may clear the code temporarily, but if the underlying cause is not corrected, F/28 will return. A reset is useful as a first step to confirm whether the fault is intermittent or persistent, but it is not a repair. Addressing the wiring or component causing the communication failure is necessary for a lasting fix.

Repair costs vary depending on the root cause. If the fix is simply reseating a loose wire connector, there is no parts cost and minimal labor. If the MCU requires replacement, parts and labor typically run in the range of $150 to $350. CCU replacement can fall in a similar or slightly higher range. Getting a diagnostic inspection first is the best way to understand the scope of the repair before committing to a cost.

Some F/28 errors can be resolved without replacing parts. Start by unplugging the washer, then carefully inspect and reseat all wire harness connectors going to the CCU, MCU, and motor. If the code returns after restoring power, further diagnosis of the MCU, CCU, and motor will be needed, which may require a technician if you are not comfortable testing electrical components.

No, you should not continue operating the washer while F/28 is active. The washer stops itself when it detects this error to prevent potential damage to the motor or control boards. Running the machine with a known communication fault between the MCU and CCU could worsen the problem and lead to a more expensive repair.