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HomeRepair HelpEmerson Microwave RepairEmerson Microwave producing a burning smell Repair
Emerson Microwave producing a burning smell
An Emerson microwave burning smell usually points to a damaged waveguide cover, especially if the cover is scorched, arcing, or will not stay in place. Stop using the microwave until you inspect and replace it if needed. If the oven cavity is clean and the waveguide cover is intact, the power supply board may have burn marks or a shorted component. A defective high-voltage capacitor or capacitor can also overheat and cause a microwave burning smell, followed by a damaged thermostat that shows visible burn marks or other damage. Food debris and grease left inside the cavity are another common cause because they continue cooking and can smell like burning plastic each time the microwave runs. Clean the cavity thoroughly, cover food, and wipe up spills after use. Any repair that requires opening the outer cabinet involves serious electrical danger. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged and must be properly discharged before interior work. Repairs involving the capacitor, high-voltage diode, transformer, power supply board, or related high-voltage components may require a qualified technician if you are not familiar with capacitor discharge procedures. Enter your Emerson microwave model number to find the exact replacement waveguide cover, capacitor, board, or thermostat for your appliance.
01 - Emerson 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 - Emerson 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 - Emerson 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 - Emerson 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 - Emerson 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 Emerson microwave smell like burning?
Can a dirty cavity or waveguide cover cause an Emerson microwave burning smell?
Is it safe to use my Emerson microwave if it smells like burning?
How do I test an Emerson microwave power supply board, thermostat, or high-voltage capacitor?
How do I find the correct Emerson microwave replacement part?
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