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HomeRepair HelpWhirlpool Microwave RepairWhirlpool Microwave producing a burning smell Repair
Whirlpool Microwave producing a burning smell
If your Whirlpool microwave smells like burning, stop using it, unplug it, and identify the source before running another cycle. The most likely cause is a damaged or loose waveguide cover that is arcing or burning, especially if it has burn marks, cracks, or will not stay in place. If the oven cavity is clean and the waveguide cover is in good condition, inspect the power supply board for burned areas or a shorted component. A failing high-voltage capacitor or capacitor can overheat and cause a microwave burning smell, as can a damaged thermostat. Food debris or grease left inside the cavity is also a common reason a microwave smells burnt, since spills can continue cooking and smoke during use. Any repair that requires opening the outer cabinet, including work on the power supply board, high-voltage capacitor, high-voltage diode, magnetron, or other high-voltage components, is hazardous. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged and must be properly discharged before interior work. Use a qualified technician if you are not familiar with capacitor discharge procedures. Enter your Whirlpool microwave model number to find the exact replacement waveguide cover, capacitor, power supply board, or thermostat for your appliance.
01 - Whirlpool Microwave Waveguide Cover
The waveguide cover might be damaged and arcing or burning. If this is the case or if the cover will not stay in place, replace it with a new one.
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02 - Whirlpool Microwave Power Supply Board
If you've confirmed the oven cavity has been cleaned of all food debris and the waveguide cover is in good condition, a defective power supply board could be one of the components producing a burning smell. You should inspect the board for any burn marks or a shorted component and replace if necessary.
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03 - Whirlpool Microwave High Voltage Capacitor
The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. A defective capacitor may overheat and produce a burning smell. Inspect the capacitor for visible damage or burn marks and replace if necessary.
Highly Likely
04 - Whirlpool Microwave Capacitor
The capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. A defective capacitor may overheat and produce a burning smell. Inspect the capacitor for visible damage or burn marks and replace if necessary.
Highly Likely
05 - Whirlpool Microwave Thermostat
If you've confirmed the oven cavity has been cleaned of all food debris and the waveguide cover is in good condition, a defective thermostat could be one of the components producing a burning smell. You should inspect the component for any burn marks or damage and replace if necessary.
Highly Likely
06 - Interior Cavity not Clean
Food that is left on the interior of the microwave can continue to cook each time the microwave is used, resulting in a burning smell. Always cover food when cooking to avoid splatter and wipe up any spills after use.
Highly Likely
Frequently Asked Questions
Why does my Whirlpool microwave smell like burning?
Can I use my Whirlpool microwave if it has a burning smell?
How do I know if the waveguide cover is causing the burning smell or sparking?
Could the high-voltage capacitor, power supply board, or thermostat cause a Whirlpool microwave burning smell?
How do I find the correct Whirlpool microwave waveguide cover or other replacement part?
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