I have a ge over the range micro that doesnt heat. It does turn on, but doesnt make that usual buzzing noise that comes on a second after turning on.

For that sound it will need atechnician but for not heating you cqn replace fuses

If you hear an unusual buzzing noise, the magnetron (the component that actually generates the microwaves) or other electronic module may be broken. This is not easily fixed; contact a service technician.

Thanks,

micro

pls. rate..

if you like your micro fixe it, becouse even do new micros look better when it comes to work they suck they hardly last the warranty period thats if you are lucky...

If it does not heat and makes a loud buzzing sound, it usually means that the magnetron has failed. It the part that generatest the microwaves that heat the food. Replacement costs for magnetrons is almost as much as a new oven, so it rarely makes sense to fix. Sorry.

> the noise goes away when turned on and used
Is it possible that the other noise produced when using the oven are only covering up the buzz?
I think your microwave has two power supplies; one that supplies the low voltages for the display and control, the other for the magnetron. The first supply may be a standard line frequency unit using an iron-core transformer and if these are cheaply made, the laminations can vibrate and cause a 'buzz.' Better transformers are 'potted' so that the laminations are glued together with epoxy and can't vibrate. On later units, the magnetron voltage is produced by a 'switched mode' power supply that uses solid ferrite instead of iron and never vibrate.
If it was my unit, I would take it far enough apart to run a couple of beads of epoxy glue across the laminated transformer to kill the resonance.

WHEN THERE IS A BUZZING NOISE IT MEANS THAT ONE OF THE INTERNAL COMPONENT HAS FAILED .RANGING FROM A SMALL DIODE TO LARGE PARTS LIKE
THE MAGNETRON OR TRANSFORMER OR CAPACITOR. IF IT IS 10 YRS,OLD YOUR BETTER
OFF GETTING A NEW ONE .BECAUSE YOU COULD INVEST MONEY IN THIS ONE AND HAVE SOMETHING ELSE GO TWO DAYS FOR NOW.WITH A NEW ONE YOU ALSO END UP WITH THE NEW WARRANTY. HOPE I HELPED. KEN62 GOOD DAY!

You can check the relay and related driving circuit. If there is a short in the relay driving circuit there is chance for this type of problem. or the micro processor may be defective.

Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
 Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.

the buzzing is the magnatron tube juicing too thousands of volts before emmitting the micro-wave radiation to what your cooking that turns molecules 180 degrees around... guess that friction is what really heats it.
radar ovens is what they use to call em and even people would stand in front of big ones to warm up long ago...lol canibles will love that.

This is not safe. If the fan is not running, the magnetron will quickly overheat and be destroyed. We answered this in more depth in the other place you asked it.