A:AnswerWhirlpool over the range microwave. Don't buy whirlpool it's junk. We bought all new high end appliances when we built our house and we have nothing but problems with them. We are replacing them slowly.
A:AnswerI had this problem with LG microwave. It was mounted above the stove and had lights to illuminate the stove top. I found that when I left the lights on, the inside of the microwave cabinet would get quite warm. When I turned off the lights it would cool down.
A:AnswerIf your old microwave had a higher power wattage than this one, then you may be able to use this one at a higher power level or even at full power. Your question has more to do with the amperage load for the circuit you're using for the microwave in your fuse box / breaker box than anything else. If you've got a gazillion things plugged into that same circuit and you're using them all simultaneously, more than likely that's where your issue is.