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HomeRepair HelpHaier Microwave RepairHaier Microwave producing a burning smell Repair
Haier Microwave producing a burning smell
When your Haier 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. Inspect the cover for dark marks, cracks, or signs it will not stay in place, and replace it if needed. If the oven cavity is clean and the waveguide cover is sound, a failing power supply board may have burn marks or a shorted component. A defective high-voltage capacitor or capacitor can also overheat and create a burning smell, followed by a damaged thermostat. Finally, food debris or grease left inside the cavity may continue cooking each time the microwave runs, so clean spills and splatters thoroughly. Enter your Haier microwave's model number to find the exact replacement waveguide cover, power supply board, capacitor, or thermostat for your appliance. Repairs involving the high-voltage capacitor, high-voltage diode, magnetron, or high-voltage transformer, and any repair requiring removal of the outer cabinet, are hazardous. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged. It must be properly discharged before interior work, so use a qualified technician if you are not familiar with capacitor discharge procedures.
01 - Haier 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 - Haier 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 - Haier 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 - Haier 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 - Haier 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 Haier microwave smell like burning?
Can a damaged waveguide cover cause a Haier microwave to spark or smell burnt?
Should I replace the high-voltage capacitor or power supply board if my microwave smells like burning?
How do I test a Haier microwave thermostat when I smell burning?
How do I find the correct Haier microwave waveguide cover or other replacement part?
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