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HomeRepair HelpQuasar Microwave RepairQuasar Microwave producing a burning smell Repair
Quasar Microwave producing a burning smell
If your Quasar microwave smells like burning, stop using it until you identify the source. A damaged or loose waveguide cover is the most likely cause because it can arc or burn during operation. Next, inspect the power supply board for burn marks or a shorted component, followed by the high-voltage capacitor, which can overheat when defective. A separate capacitor or a damaged thermostat may also produce a burning smell from the microwave. Finally, check the interior cavity for food debris or splattered grease that continues cooking each time the microwave runs, and clean the cavity thoroughly. Replacing a waveguide cover, power supply board, thermostat, or capacitor may require opening the outer cabinet. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged, so it must be properly discharged before any interior work. If you are not familiar with capacitor discharge procedures, have a qualified technician handle repairs involving the high-voltage capacitor or power supply. Enter your Quasar microwave's model number to find the exact replacement waveguide cover, power supply board, high-voltage capacitor, capacitor, or thermostat for your specific appliance.
01 - Quasar 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 - Quasar 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 - Quasar 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 - Quasar 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 - Quasar 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 Quasar microwave smell like burning?
Can a microwave waveguide cover cause a burning smell?
Can food debris make a Quasar microwave smell like burning?
Is it safe to test the power supply board or high-voltage capacitor?
How do I find the correct Quasar microwave waveguide cover or other replacement part?
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