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HomeRepair HelpJenn Air Microwave RepairJenn Air Microwave producing a burning smell Repair
Jenn Air Microwave producing a burning smell
When a Jenn Air microwave smells like burning, stop using it until you identify the source. The most likely cause is a damaged or loose waveguide cover, also called a mica sheet, that is arcing or burning inside the oven cavity. Next, inspect the power supply board for burn marks or a shorted component. A failing high-voltage capacitor or high-voltage diode can also overheat and create a burning smell, as can a damaged thermostat. Finally, check the interior cavity for baked-on food, grease, or spills that continue cooking each time the microwave runs. Clean the cavity thoroughly and cover food to help prevent splatter. Replacing a waveguide cover may be a manageable repair, but any work requiring removal of the outer cabinet, including inspection or replacement of the power supply board, high-voltage capacitor, high-voltage diode, or transformer, requires care. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged and must be properly discharged before interior work. Use a qualified technician if you are not familiar with capacitor discharge procedures. Enter your model number to find the exact Jenn Air replacement part for your microwave.
01 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 - Jenn Air 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 Jenn Air microwave smell like burning plastic?
Can food debris or a waveguide cover cause a microwave burning smell?
How do I test a Jenn Air microwave thermostat when it smells burnt?
Is a Jenn Air microwave burning smell caused by the high-voltage capacitor or power supply board?
How do I find the correct Jenn Air microwave waveguide cover or other replacement part?
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