MICRO WAVE IS NOT HEATING. Light works; table turns but not heat.

first:check AC chord.,
2nd:check fuse,f fuse open check big capacitor.
3rd:check heating element if shorted replace it....hope it can help.

If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off.
Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if contact is not through the microwave will not work.

Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type. In this case it seems that the program controller board has errors specially if the oven heats and shuts off. remove the board, clean and reset.
If there is heating without any issues, you can use the microwave safely

Check the door safety interlock switches. Magnatrons are pretty tough but the little switches are not.

How old is your m wave? Sounds like you need to replace it .You can get a new one from Wal mart for under 75.00.and that will get you the big 1 sq.ft one..I once broke the plate in my m/wave and believe it or not they wanted more for the new plate than I paid for the M/wave BEFORE you do that check your power level settings perhaps it was turned down

it sounds like it one of your micro-switches inside that control the power to the doors, if one of the switches is bad, it would cut the power , the panenl will light, the turn table will work, the fan will turn on , but you will not get any heat at all, micro-switches run depending onthe unit from 5-10 bucks, when you open the unit you will see the one that is bad, is usually bent or the connector might be burn or melt, good luck..!

FIK IT THE HEATING ELEMENT IS STRIGHT FORWORD AND COST IS CHEAP, GO FOR IT .

The light inside the micro wave needs to be replaced most have a door on the back side that yo can remove the screw and unscrew the bulb and take to a applince shop and purchance a new one to replace.

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.

don't know about the red light, but (fancy this) I had the same problem with my microwave tonight. Everything but heat worked. Unplug it, plug it back in. Worked for my GE Spacemaker.

Do you cook a lot of popcorn?

Do you place your food items in the center of the turntable as opposed to placing them off-center?

Both can cause repeated heating of the same spot on the turntable, which can stress it and allow it to crack.

You can buy replacement parts here.

I suggest that when you cook popcorn, place a paper plate or two upside-down under the bag and always place your food items off-center on the turntable tray.

Once you have the new parts, I would suggest at least a quick heat test. That is to heat one cup of water on high and it should boil in about 2 to 2-1/2 minutes.

If you would like to perform a more standard heat test, please see my Ask Mr. Microwave page.

If your magnetron is indeed running too hot, then it is probably dying. Sometimes - like a star - they can burn hotter right before they die.

We're happy to help and we appreciate your thoughtful rating of our answer.