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HomeRepair HelpSharp Microwave RepairSharp Microwave producing a burning smell Repair
Sharp Microwave producing a burning smell
When your Sharp microwave smells like burning, stop using it until you identify the source. The most likely cause is a damaged or loose waveguide cover, which can arc and create a burning smell inside the oven. Next, inspect the power supply board for burn marks or shorted components after cleaning all food debris from the cavity. A failing high-voltage capacitor or capacitor can overheat and produce a microwave burning smell, as can a damaged thermostat. Food splatter or debris left on the interior can also continue cooking and cause a burning smell from the microwave, so clean the cavity and cover food before use. Replacing a waveguide cover or cleaning the cavity may be a manageable DIY repair, but any repair that requires opening the outer cabinet needs care. 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 high-voltage capacitor, power supply board, or other high-voltage components may require a qualified technician if you are not familiar with capacitor discharge procedures. Enter your Sharp microwave model number to find the exact replacement part for your appliance.
01 - Sharp 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 - Sharp 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 - Sharp 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 - Sharp 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 - Sharp 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 Sharp microwave smell like burning?
Is a burning smell from my Sharp microwave dangerous?
How do I know if the Sharp microwave waveguide cover is causing the burning smell?
Could the Sharp microwave power supply board or high-voltage capacitor be overheating?
How do I find the correct Sharp microwave waveguide cover, thermostat, or other replacement part?
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