Washer-dryer combo will not start any cycle; display shows F01 and beeps.

Safety first: Unplug the KitchenAid combo from the wall outlet or switch off the dedicated breaker before any work. Do not work on live circuits.

• Power reset: Disconnect power for 5 minutes, then restore power and try to start a cycle. Sometimes a transient fault clears.
• Check outlet and supply: Verify the outlet has 120V AC (North America) using a meter or by plugging in another appliance. Confirm the washer-dryer’s power cord is fully seated and not damaged.
• Inspect control board connections: Remove the top panel (usually 2–3 screws at the back, slide back and lift). Locate the main control board (CCU) near the rear or side. Check all harness plugs for being fully seated, no burnt pins, and no corrosion. Reseat each connector one at a time.
• Look for board damage: Examine the CCU for burnt spots, bulging capacitors, or melted traces. If visible damage is present, the board must be replaced.
• Replace CCU if needed: Order the correct KitchenAid main control board using the full model number. Transfer one connector at a time from the old board to the new one to avoid miswiring. Reassemble, restore power, and run a diagnostic or quick wash test.

When to call a technician: If F01 returns immediately after a reset and wiring checks good, professional diagnosis is recommended before replacing the expensive control board.