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HomeRepair HelpFrigidaire Microwave RepairFrigidaire Microwave producing a burning smell Repair
Frigidaire Microwave producing a burning smell
A Frigidaire microwave producing a burning smell should be turned off and inspected before you use it again. The most likely cause is a damaged or loose waveguide cover, which can arc or burn inside the oven cavity. If the cover is damaged or will not stay in place, replace it. Next, inspect the power supply board for burn marks or a shorted component. A defective high-voltage capacitor or capacitor can also overheat and create a microwave burning smell, especially because it works with the high-voltage diode and transformer. A damaged thermostat is another possible source. Finally, check the cavity for food debris or splatters that may continue cooking and cause a burning smell from the microwave. Any repair that requires opening the outer cabinet, including work on the power supply board, high-voltage capacitor, high-voltage diode, or transformer, 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. If you are not familiar with capacitor discharge procedures, use a qualified technician. Enter your Frigidaire microwave model number to find the exact replacement waveguide cover, board, capacitor, or thermostat for your appliance.
01 - Frigidaire 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 - Frigidaire 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 - Frigidaire 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 - Frigidaire 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 - Frigidaire 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 Frigidaire microwave smell like burning plastic?
Can a damaged waveguide cover cause microwave sparking and a burning smell?
What parts can cause a burning smell after the microwave cavity is clean?
How do I safely check a Frigidaire microwave that smells burnt?
How do I find the correct Frigidaire microwave waveguide cover or other replacement part?
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