Parts for Whirlpool MT3090XBB0: 02 - Magnetron And Air Flow, Literature Parts

The Magnetron is an OEM part for Whirlpool microwaves. This part generates the microwave energy necessary for cooking and heating food.

Causes of a bad Magnetron can include normal wear and tear over time, power surges or electrical issues, or physical damage from impact or mishandling.

Symptoms of a bad Magnetron include:

• The microwave not heating or cooking food properly
• Arcing or sparking inside the microwave cavity
• Strange noises or buzzing sounds during operation
• Burning smells or smoke coming from the microwave

This OEM Whirlpool part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper and some Kenmore models.

This fixed thermostat protects the appliance by opening the circuit when excessive heat is detected. Replacing a failed or weak thermostat restores reliable over-temperature protection and helps prevent heat-related shutdowns.

• Opens the circuit if the protected area overheats to help prevent damage to components
• Helps with symptoms like unexpected shutdowns during operation or no power after overheating
• Can be the cause when the unit only runs again after cooling down
• Helps maintain safe operating temperatures around heat-sensitive parts

• Disconnect power before servicing; some appliances contain high-voltage components
• Access location varies by model; note wire positions before removal and transfer one lead at a time
• Reuse existing mounting hardware; ensure firm terminal connections and correct orientation
• After replacement, confirm proper airflow/venting and normal operation

This replacement screw is a general-purpose fastener used to secure exterior panels, trim, or internal components on compatible Whirlpool appliances. It restores proper fit and reduces rattles or loose parts for a safer, more reliable appliance. What it does:

• Secures panels, trim pieces, or mounting brackets to keep components in place
• Prevents vibration-related noise and movement caused by missing or loose fasteners
• Helps maintain alignment of control panels and exterior housings
• Replaces stripped, corroded, or lost screws to restore original fit

• Use the correct screwdriver or bit to avoid stripping the head
• Match screw length and thread engagement with the original for a secure fit
• Tighten to snug only; over-tightening can strip threads or crack panels
• Disconnect power before performing repairs on electrical components

This block-style fuse holder secures and connects the appliance fuse to the wiring harness, restoring a safe electrical connection and thermal protection. Use it when the original fuse block is cracked, corroded, or no longer holding the fuse securely. What it does:

• Holds and connects the appliance fuse to the wiring harness so the thermal/overload fuse can function.
• Restores reliable electrical contact when the original block is cracked, melted, or corroded.
• Addresses symptoms such as intermittent power, no heat, or appliance not starting when caused by a bad fuse connection.
• Works with the existing fuse and wiring—does not replace the fuse itself.

• Disconnect power to the appliance before inspecting or replacing this part.
• Replace any damaged wiring, connectors, or insulation found during replacement; do not cut corners or bypass thermal safety devices.