When using the microwave, all functions are normal with the exception that the unit does not heat anything. the timer works, the table turns, it lights up and goes 'DING', but the food is as cold coming out as it was going in....
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Re: does not heat food
One of the following has failed -
Magnetron Transformer Diode Capacitor Fuse (but these don't blow for no reason.).
These can be purchased and replaced, being careful to re-assemble all covers and housings exactly as disassembled. Same thing happened to my in-laws several years back. You can find P/N's for each of the components listed above on the components themselves, or from an appliance website. The only component that is testable is the transformer. Fuses can be replaced (see note above), but the diode and magnetron are not testable without special equipment. They are cheap enough anyway, when compared to the cost of replacing the whole unit.
But by all means, do not repair if you feel you cannot reassemble exactly as the unit came apart. Your dealing with invisible microwave radiation, and that can hurt you. An improperly reassembled unit is dangerous.
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Check whether there is a proper power supply. Look to see whether the cord is connected to a grounded 3-prong outlet and the cord is fully plugged in. If the electrical system is built-in and no power cord is visible, replace or reset the household fuse or circuit breaker.
Some basic microwave operational steps may affect whether the microwave is heating. Open and close the microwave door, as the unit will not function with the door open, and push "Stop/Clear" to cancel any previous settings, such as the timer, which do not heat the microwave oven.
Setting the Microwave
Once the power to the microwave has been reset, or verified as working, and the microwave is ready to run, select a new cook cycle and press "Start" to see if the microwave begins to run and cook food as expected. Allow the food to cook for the alloted time and then open the microwave door and check to see if the food has cooked or heated. Choose a longer cooking time and restart the microwave if food is heating but is cooking slowly.
If all efforts to troubleshoot the function and power to the microwave still do not get the appliance heating food as expected, there may be a repair issue that needs to be addressed. Contact professional technician for advice.
this is likely to be the magnatron,,(spelling may be wrong) thats the part that heats the food up,,they can just go "pop!" and stop working,,,
there very pricy parts to buy and fit so to be honest you would be better off getting a new unit,
if everything works except the heating, it is most likely the mag tube is on its way out.........that is the most common reason for it not too cook.......since the microwave is a GE and it is 3.5 years old, i would say you are better off buying a new microwave, the mag tube starts at around $70.00 and up + the labor it costs too have a service person put it in........around another $60.00
you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt