Microwave blowing fuses

Sanyo isn't that great of a manufacturer.. I had a microwave from them a few years back that did the same thing.. The wiring inside the microwave is shot.. if you were to open it up, you'd probably see some burnt wires from a short. If you use the microwave over a range, it may be because of grease build-up...

anyhow, its better that you invest in a new microwave, rather than fix it. It will be much more cost efficient