Defrost bi-metal
Replaces 2182380
Senses temperature so the fridge cycles on and off.
Upright freezer run capacitor
Replaces 2169373
A motor that hums but won't start often needs a new capacitor.
Light switch
Replaces 1118894
Door, lid and control switches stop a cycle when they fail.
1Defrost bi-metalWP4387503
2Run capacitorWPW10662129
3Light switchW11384469Part numbers come from the Sears PartsDirect parts list for the KitchenAid KTHD18KEWH01 (view the list), checked November 15, 2026. Amazon buttons open a search for the part number; we may earn a commission.
Where the model number is
Inside the fresh food section, on a side wall or the ceiling near the light. Some models: behind the kick plate at the bottom.