Statesman microwave making a loud buzzing noise
My Statesman microwave (SKMS0820), 2 years old — it makes a really loud buzzing/humming whenever it's running. Grateful for any pointers, thanks.
Solution Summary
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Statesman SKMS0820 microwave loud buzzing/humming during use
- The problem
- A 2-year-old Statesman SKMS0820 microwave was reported to make a very loud buzzing or humming noise whenever it runs.
- Likely cause
- The discussion suggests the noise is more likely from the heating/high-voltage side if it only occurs during heating, with possible involvement of the transformer, magnetron, or diode/capacitor area. External causes such as an incorrectly seated turntable, roller ring, glass plate, loose panel, poor levelling, or fan-related noise were also suggested. No single fault was confirmed.
- What fixed it
- Recommended action was to compare noise during non-heating operation versus normal cooking if the model allows, heat a mug of water to see whether heating performance is affected, and check that the turntable parts and casing setup are correct. The advice was to stop using the microwave if there is arcing, burning smells, intermittent heating, or a much harsher hum. Exact repair was not confirmed; further diagnosis should be carried out by a suitably qualified appliance engineer.
- Checks to try
- Whether the noise only happens when heating
- Heating a mug of water for 30–60 seconds to compare noise and heating performance
- Turntable, roller ring and glass plate seated properly
- Nothing touching the casing
- Microwave standing level
- Listening for fan noise from rear or side vents
- Checking for arcing, burning smells, intermittent heating, or a harsher-than-usual hum
- Parts or tools mentioned
- turntable
- roller ring
- glass plate
Safety: Do not remove the cover unless properly trained. Microwaves contain dangerous high-voltage components that can remain hazardous even when unplugged.
1 Answer
A loud buzz or hum on a microwave usually means either a normal component has become noticeably noisier, or there’s a developing fault in the high-voltage side. On a 2-year-old Statesman, it’s worth checking the simple things first.
1. Check whether the noise only happens when heating - Run the microwave with the timer set but no heating function if your model allows it, then compare with normal cooking. - If the loud buzz only starts when it is actually heating, the noise is more likely from the high-voltage transformer, magnetron or diode/capacitor area rather than the turntable motor or cooling fan.
2. Try a mug of water - Heat a mug of water for 30–60 seconds. - If it makes the loud hum but still heats normally, it could be a transformer or magnetron getting noisy. - If it hums loudly and heating is poor or absent, that points more towards a fault in the high-voltage circuit.
3. Check for obvious external causes - Make sure the turntable, roller ring and glass plate are seated properly. - Check nothing is touching the casing and that the microwave is standing level. - Listen for fan noise from the rear or side vents, as a fan blade or loose panel can sometimes buzz.
4. Stop using it if there are other symptoms - Arcing, burning smells, intermittent heating, or a much harsher-than-usual hum are warning signs.
Important: isolate it from the mains before inspecting anything, and do not remove the cover unless you are properly trained. Microwaves contain high-voltage components that can remain dangerous even when unplugged. Any internal mains or high-voltage microwave work should be left to a qualified engineer.
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This answer was generated automatically by the WhitegoodsHelp AI Assistant. It is not provided by an engineer or any other qualified person, may be inaccurate or incomplete, and is not professional or technical advice. Do not rely on it. Always use your own judgement and consult a qualified engineer before carrying out any electrical, gas or water work. Use is entirely at your own risk. See our full Terms of Use.
SAFETY FIRST: READ BEFORE ACTING ON THIS GUIDANCE
Never work on a live appliance
Always unplug it at the mains before going near it with any tools.
Never attempt gas work
By law, gas appliances must only be worked on by a Gas Safe registered engineer. If your fault involves gas, stop and call a professional. Do not attempt it yourself.
Watch for sharp edges
Outer panels are smooth, but internal parts have sharp machined edges. Wear protective gloves and arm sleeves.
Water appliances can leak
Turn off the water supply before disconnecting any hoses.
Know your limits
If you are not confident testing or working inside the appliance, stop and call a professional.
AI guidance, not guaranteed
This response is generated automatically by the WhitegoodsHelp AI Assistant. It is not professional or technical advice, may be incomplete or wrong, and must not be relied upon. Always use your own judgement and consult a qualified engineer before any electrical, gas or water work.
This is general information only and is not professional advice. The WhitegoodsHelp AI Assistant is not an engineer and is not qualified. See our full Terms of Use.
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