see this causes and proceed. God bless you
Magnetron
If the microwave is loud or noisy only when
cooking, the magnetron tube might be defective. The magnetron uses high
voltage, high current DC power to generate the microwave frequency that
cooks the food. Under normal circumstances the magnetron is nearly
silent. However if it is damaged or nearly burned out it can begin
emitting high pitched or growling noises. It's not normally dangerous to
use a microwave oven when it makes these noises, but they are an
indication that the magnetron is almost dead and will need to be
replaced.
Exhaust Fan Motor
If the microwave is loud when running the fan motor might be
Stirrer Motor
If the microwave is loud or noisy the stirrer
motor might be worn out. The stirrer is a metal blade which slowly
turns around, deflecting the microwave energy in a random pattern inside
the microwave oven. As the motor nears the end of its useful life it
begins to make grinding noises. The microwave will not heat food evenly
without this stirrer, the motor should be replaced.
Turntable Motor
If the microwave is loud or noisy the
turntable motor might be worn out. This is a common problem and
relatively easy to replace.
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