Question about Sharp R-401CW Microwave Oven
These symptoms began just when I moved it to a new apt. When I first observed the malfunctioning behavior, I quickly turned it off for concern of danger or damage to the unit. I took it to a certified repair facility and everything tested fine. My landlord "tested" it and said it cooked a bag of popcorn in 2 minutes, so doesn't think there is a problem with the apt. wiring or the oven. He has done nothing further in spite of my insistence the problem has not been resolved. Sure enough, it does cook normally and I am using it now with the continued odd behavior. I notice that when cooking on lower settings, the light, fan, etc. come back to life normally when the power intermittently shuts off. Other appliances in the apt. (lights, fans, etc.) mimic this same behavior. Any insights would be greatly appreciated.
It sounds perfectly normal. A microwave generally draws about 13 amps or more when cooking at full power. That's a considerable amount. This current draw will actually "load down" the power line, resulting in a small but measurable drop in the voltage. The decreased voltage means the light will be dimmer and the motors for the fan and turntable will run a bit slower. BUT if you ever have _chronic_ flickering, dimming or brightening lights in your home, it could be the result of a bad connection on the neutral, etc., which can lead to a very dangerous condition. Once in a while is okay, but if it happens a lot, your landlord or electric company should examine the lines.
Posted on Apr 25, 2007
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