Parts for Whirlpool MT4078SKQ0: 05 - Oven Interior Parts

This propeller is the small impeller that mounts to the dishwasher circulation pump to move wash water through the spray arms for effective cleaning. Replacing a worn or damaged propeller restores proper water flow and wash performance. What it does:

• Spins on the pump shaft to circulate wash water through the spray arms
• Restores normal water flow when a cracked or stripped propeller reduces circulation
• Helps resolve symptoms such as poor cleaning, weak spray, or inconsistent water movement
• Works with the pump motor; does not include the motor or pump housing

• Disconnect power and water supply before beginning any repair
• Access the pump assembly from the dishwasher base or cabinet front per your model service instructions
• Inspect the pump shaft and seal for wear; replace damaged components to prevent repeat failure
• Reassemble carefully and test operation

The high voltage wire carries electrical current from the transformer to the magnetron inside the microwave. Replace it if the microwave doesn't heat food, sparks internally, or fails to start completely.

This thermal safety device monitors temperature in your microwave and shuts off power if overheating occurs. It protects the magnetron and other components from damage due to excessive heat. Replace it if your microwave stops heating, runs but doesn't heat food, or shuts off unexpectedly.