Parts for Whirlpool MT4078SPB4: 05 - Oven Interior Parts

This is a fan blade that attaches to the motor shaft inside the microwave to circulate air for cooling internal components. It helps prevent the magnetron and other electronics from overheating during operation. Replace this blade if it is cracked, broken, or warped, or if the microwave is running louder than normal or overheating during use.

This is a high voltage diode wire assembly used in the microwave's power circuit. It works with the capacitor and magnetron to convert electrical current and generate microwave energy for cooking. Replace this part if the microwave runs but does not heat, or if the diode has visibly burned or shorted out.

This replacement power cord restores the electrical connection to your appliance so it powers reliably. Designed as a direct-fit cord assembly to replace a damaged or worn lead and help restore normal operation. What it does:

• Provides the main AC connection between the appliance and your household outlet
• Replaces frayed, cut, or broken cords that can cause loss of power or intermittent operation
• Helps eliminate sparking or exposed wiring hazards from a damaged cord
• Restores safe, stable power delivery when the cord is the root cause of power issues

• Disconnect power at the breaker and unplug the appliance before starting any work
• Route and secure the cord per the appliance wiring diagram; avoid pinching or sharp bends
• Do not attempt to splice or modify the cord