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HomeRepair HelpRCA Microwave RepairRCA Microwave producing a burning smell Repair
RCA Microwave producing a burning smell
When an RCA microwave smells like burning, stop using it until you identify the cause. The most likely problem is a damaged or loose waveguide cover that is arcing or burning. Replace the cover if it shows burn marks, cracks, or will not stay in place. If the cavity is clean and the waveguide cover is sound, inspect the power supply board for burn marks or a shorted component. A failing high-voltage capacitor, also called the microwave capacitor, can overheat and create a microwave burning smell, as can a defective thermostat. Food debris or splattered grease left inside the cavity can continue cooking and cause the microwave to smell like burning, so clean the interior thoroughly and cover food during use. Any repair that requires opening the outer cabinet, including work on the high-voltage capacitor, high-voltage diode, magnetron, or high-voltage transformer, is hazardous because the capacitor can store a lethal charge even after the microwave is unplugged. Proper capacitor discharge is required before interior work, so use a qualified technician if you are not familiar with that procedure. Enter your RCA microwave model number to find the exact replacement waveguide cover, power supply board, capacitor, or thermostat for your appliance.
01 - RCA 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 - RCA 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 - RCA 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 - RCA 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 - RCA 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 RCA microwave smell like burning?
Can I use my RCA microwave after it starts producing a burning smell?
How do I check the waveguide cover and other parts causing a microwave burning smell?
Should I replace the RCA microwave capacitor or power supply board first?
How do I find the correct RCA microwave waveguide cover or other replacement part?
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