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HomeRepair HelpCaloric Microwave RepairCaloric Microwave producing a burning smell Repair
Caloric Microwave producing a burning smell
If your Caloric 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 inside the cavity. Next, inspect the power supply board for burn marks or a shorted component. A failing high-voltage capacitor or capacitor can overheat and create a microwave burning smell, followed by a damaged thermostat. Food debris left on the cavity walls or ceiling can also continue cooking and cause a burning smell from the microwave, so clean spilled food thoroughly and cover food during use. Replacing a waveguide cover, power supply board, high-voltage capacitor, capacitor, or thermostat may require opening the outer cabinet. 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, have a qualified technician handle the repair. Enter your Caloric microwave model number to find the exact replacement part for your specific appliance.
01 - Caloric 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 - Caloric 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 - Caloric 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 - Caloric 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 - Caloric 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 Caloric microwave smell like burning?
Can a microwave waveguide cover cause a burning smell or sparks?
How do I test a Caloric microwave thermostat or fuse causing a burning smell?
Could the power supply board or high-voltage capacitor be causing the burning smell?
How do I find the correct Caloric microwave waveguide cover or other replacement part?
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