Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpHotpoint Microwave RepairHotpoint Microwave producing a burning smell Repair
Hotpoint Microwave producing a burning smell
When your Hotpoint microwave smells like burning, stop using it until you identify the source. The most likely cause is a damaged or loose waveguide cover, which can arc, scorch, or burn during operation. Next, inspect the power supply board for burn marks or a shorted component. A failing high-voltage capacitor or capacitor can overheat and produce a burning smell, followed by a defective thermostat. Food debris inside the cavity is also a common cause because spilled food can continue cooking and burn each time the microwave runs. Clean the cavity thoroughly, then inspect the waveguide cover and other accessible parts for damage. If the smell resembles burning plastic, burning wires, or electrical components, do not operate the microwave. Replacing a waveguide cover may be a manageable DIY repair, but any repair that requires opening the outer cabinet involves a high-voltage capacitor that can store a lethal charge even after the microwave is unplugged. The capacitor must be properly discharged before interior work, and a qualified technician should handle the repair if you are not familiar with safe capacitor discharge procedures. Enter your model number to find the exact replacement waveguide cover, power supply board, capacitor, or thermostat for your Hotpoint microwave.
01 - Hotpoint 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.
Enter model number to search for the required part specific to your product
Top Solution
02 - Hotpoint 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.
Top Solution
03 - Hotpoint 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 - Hotpoint 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 - Hotpoint 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 Hotpoint microwave smell like burning?
Can a damaged waveguide cover cause a burning smell in a Hotpoint microwave?
Is a burning smell from a microwave caused by the high-voltage capacitor or power supply board?
How do I find the correct Hotpoint microwave waveguide cover or other replacement part?
What should I do if my Hotpoint microwave still smells burnt after cleaning?
Shop by Hotpoint Microwave Parts
Shop by Popular Hotpoint Microwave Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com