Amana Microwave

Hello,

I’m having problems with our 16 month old Amana over the range microwave. A week ago, the microwave just went dead. I noticed a surge in the dining room lights and immediately thought fuse. I took apart the control panel and located the 250 amp fuse. I checked the fuse and it was dead. I replaced the fuse and the microwave seemed to work. Then tonight, when I went to use it, the fuse in the microwave blew again. Can you provide any guidance as to what the problem might be?

Thanks