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HomeRepair HelpToshiba Microwave RepairToshiba Microwave producing a burning smell Repair
Toshiba Microwave producing a burning smell
If your Toshiba 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, especially if the microwave is sparking inside. If the cover is discolored, cracked, or will not stay in place, replace it. Next, inspect the power supply board for burn marks or a shorted component. A failed high-voltage capacitor or capacitor can overheat and create a burning smell, followed by a damaged thermostat. Also check the interior cavity for grease, spilled food, or debris that may continue cooking and produce a microwave burning smell, burning plastic smell, or burning wires smell. Repairs involving the power supply board, high-voltage capacitor, high-voltage diode, magnetron, or other components behind the outer cabinet require caution. 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 model number to find the exact Toshiba microwave replacement part for your specific appliance.
01 - Toshiba 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 - Toshiba 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 - Toshiba 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 - Toshiba 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 - Toshiba 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 Toshiba microwave smell like burning?
Could a Toshiba microwave burning smell come from the power supply board or thermostat?
Is a Toshiba microwave with a burning smell dangerous to use?
What should I do if my Toshiba microwave is sparking or arcing inside?
How do I find the correct Toshiba microwave waveguide cover or other replacement part?
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