2 month old microwave is arcing in the centre under the plate?
This has happened to 2 previous different brands?? first arcing, or some sort of bright light, and smoke, then on my old microwaves, the plastic in the middle under the plate actually caught fire. The first model which was 2nd hand and in perfect condition, was in use for a year when there was a sudden loud pop and a massive puff of dark smoke came out from underneath the microwave!!
I am wondering if this an electric circuit/wiring problem in my home. If it makes a difference the microwaves have always been positioned on a thick sturdy kind of shelf, but above a very vigorous washing machine when on full spin??
Another fact to mention that maybe of some relevance is that i have an electric pay as u go type system, that has shut off at times, and when the electricity is turned back on the microwave has still been plugged into the mains, although the arc/smoke problems haven't occurred straight after??
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Q - When there is small amounts of food in the oven, arcing occurs right behind the plate where the wave guide comes into the oven. Sometimes it works well and sometimes you can't even put in a bag of popcorn. Any ideas? Could food have 'dripped' in here and be causing a microwave short?
A - Yes! Food splatter or drips can continue to cook and will carbon over creating sparks/arcs from the wave guide cover. Usually can clean up the food on and under the wave guide cover, if the oven liner has been damaged we usually lightly sand and touch up those marks with touch paint. Do not let it go for too long as damage to the magnetron end is possible as well :( If the wave guide cover has been damaged, replace it!
Hello. To me, it sounds like something is stuck to the inside of your cavity and it is arcing, as you are seeing a bright flash, and hearing it. I would take apart/clean everything inside the cooking area, something is causing a problem in there. Usually just a good cleaning is all it needs, as the debris is making a focus point for the energy. Try putting a small glass of water, only 1/4 full, and watch while you start it, to see where the arcing is, it won't hurt anything for a second or 10.
Did you properly orient the exhaust vent and take out any shipping materials under the exhaust vent? Sounds like the exhaust fan itself may be overheating, smoking up the innards of the microwave and then the smoke is escaping though the hole where the carousel is located.
Either that or someone built the shaft of the carousel rotator out of the wrong material and the microwave is actually trying to cook (or arc) that piece, causing a fire.
Carla, Sorry to read of your troubles. Your unit that is only 2monts old should be under warranty, or did you receive any warranty?
What you describe as " the noise one gets when metal is put in by mistake". The noise is Arcing of Microwave Energy. Do not operate a Microwave Oven DRY (without something inside that will absorb the Microwave Energy. A Dry-Run Microwave Oven will feed-back upon itself and do damage.
If your unit is matched to the electric needs, both voltage and cycles, then I would not get another one of the same Model.