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HomeRepair HelpKenmore Microwave RepairKenmore Microwave producing a burning smell Repair
Kenmore Microwave producing a burning smell
If your Kenmore microwave smells like burning, stop using it until you identify the source. The most likely cause is a damaged or loose waveguide cover that is arcing or burning inside the oven cavity. Next, inspect the power supply board for burn marks or a shorted component after cleaning away all food debris. A defective high-voltage capacitor or capacitor can overheat and create a burning smell, and a damaged thermostat may also show scorching or other visible damage. Food splatter or debris left on the cavity walls can continue cooking and cause a microwave burning smell, so clean the interior thoroughly and cover food during use. Replacing a waveguide cover may be a manageable DIY repair, but any repair that requires opening the outer cabinet involves a high-voltage capacitor that can store a lethal charge even after the microwave is unplugged. The capacitor must be properly discharged before interior work, and repairs involving the power supply board, high-voltage capacitor, or thermostat may require a qualified technician if you are not familiar with capacitor discharge procedures. Enter your Kenmore microwave model number to find the exact replacement part for your specific appliance.
01 - Kenmore 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 - Kenmore 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 - Kenmore 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 - Kenmore 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 - Kenmore 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 Kenmore microwave smell like burning?
Can a microwave waveguide cover cause a burning smell or sparking?
What other parts can cause a Kenmore microwave burning smell?
Is a microwave burning smell dangerous, and can I test the parts myself?
How do I find the correct Kenmore microwave waveguide cover or other replacement part?
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