Whirlpool Microwave Hood Light Bulb – Replacement & Troubleshooting

Understanding the Problem

Many Whirlpool over-the-range microwaves use a small appliance bulb behind a removable lens to illuminate the cooktop. When the hood light fails you’ll most often find a burned-out bulb, but loose contacts, a bad socket, a faulty door/switch, or wiring issues can also be the cause. Below are clear diagnostic and repair steps you can follow to fix the hood light yourself. 1) Identify the bulb type - Check your microwave owner's manual or the label inside the microwave door for bulb specifications (base type and wattage). Common replacements are A15 appliance bulbs with a medium (E26) base, 120V 25–40W incandescent, or appliance-rated LED replacements sized for enclosed fixtures. 2) Prepare and power off - Unplug the microwave or switch off the breaker feeding it. Even if the light circuit seems low-voltage, always remove power before working on the appliance. 3) Remove the lens/cover - Most hood lenses snap out or are held by small screws. Use a flat screwdriver to release tabs or remove screws and set the lens aside. 4) Remove and inspect the bulb - Unscrew (or pull out, depending on bulb type) the bulb and inspect for a broken filament, burn marks, or cloudy/dark glass. If you have a known-good bulb of the same type, swap it in to test. 5) Test the old bulb (optional) - Use a multimeter set to continuity/ohms. A good incandescent will show continuity across the base. If it reads open, the bulb is dead. 6) Replace with the correct bulb - Install an appliance-rated bulb with the same base type and recommended wattage. For reduced heat and long life, use a compatible enclosed-fixture appliance LED of the same size and base. Reinstall lens and restore power to test. 7) If a new bulb doesn't fix it — test the socket - With the microwave plugged in and power on (use caution): remove the bulb, turn the light on, and carefully measure for ~120 VAC at the socket with a voltmeter. If you don’t see voltage, the problem is upstream (switch, wiring, control board); if you do see voltage but the bulb doesn’t light, the socket or bulb is bad. 8) Inspect and repair the socket and switch - If the socket looks burned/corroded, replace the socket assembly. To access the socket you usually remove the microwave’s outer cover or bottom panel and the vent/hood trim. Disconnect power first. Replace the socket with an OEM or compatible socket, reconnect wiring, and reassemble. 9) Check the light switch or control board - If the socket gets voltage when the light is switched on but the light still won’t work, test the light switch (continuity when toggled) and inspect wiring to the control board. Replace a defective switch or control board as required. 10) Reassemble and final test - Reinstall lens and screws, restore power, and verify light operation and that any replacement bulb sits securely without wobble. Safety note: Microwaves contain high-voltage components (magnetron and capacitor). If your diagnosis requires removing the outer cover beyond light/access panels, unplug the unit and, if you are not experienced, consider professional service. Avoid contact with high-voltage circuitry and discharge the capacitor only if you know the correct safe procedure.

Common Symptoms

Hood light does not turn on, is dim, flickers, or only works intermittently; lens may appear dark/charred if bulb burned; light works sometimes when nudged.

Common Causes

• Burned-out bulb (most common)
• Loose or corroded light socket
• Faulty hood light switch or control board
• Damaged wiring or connector

Popular Parts That Fix This Problem

These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.

Frequently Asked Questions