Our 8 year old above counter Frigidare microwave does not heat things. It makes the usual sounds and the lights work, but there is an added buzzing sound and a faint smell of something burning. Model # GLMV168K03 Serial # PG21700522
Kitchen Ranges - Frigidare - FEF336EC Stainless Steel Electric Kitchen Range
Answers & Comments
It sounds like it is the magnetron of the device, which is very difficult and expensive to repair. For an 8 year old microwave I'd say it's definitely not worth trying to repair it, it will be much more cost effective to just replace the device.
Sorry about the bad news, you can get it repaired but it will cost as much as a new microwave unit.
Thanks
Tim