Drying function fails and F13 is displayed; washer cycles may complete but clothes do not dry.

Safety first: Unplug the combo and allow it to cool before working on the drying system.

• Access dryer components: Remove the top and rear panels. Locate the dryer fan housing and air duct assembly.
• Inspect fan and duct: Check for lint buildup blocking the fan blades or duct passages. Clean thoroughly with a vacuum and brush.
• Test fan motor: Spin the fan by hand; it should rotate freely. Use a multimeter to check the fan motor windings for continuity. Replace the fan motor if open or seized.
• Check thermal fuse and thermostats: Locate the thermal fuse and thermostats on the dryer duct. Test for continuity; replace any open components with the correct KitchenAid parts.
• Verify dryer NTC sensor: Test the dryer temperature sensor for proper resistance at room temperature per service specs. Replace if out of range.
• Reassemble and test: After cleaning and replacing any faulty parts, reassemble panels, restore power, and run a drying cycle to confirm F13 is cleared and drying performance is restored.