I have a be microwave. Turned it on to cook something and heard a pop. After about 10 more seconds it completely shut off. Blew house circuit breaker. Reset breaker. Programmed time. Turned unit back on to cook. 10 seconds blew breaker again. Any ideas?

Blown fuse inside of unit. Must find out why fuse blew, something shorted or bad connections.

You have a shorted cook relay.

You have a shorted cook relay.

Sounds like the inverter (power supply for cooking) or the magnatron which does the work----neither are cheap parts.

Microwaves have an inline fuse inside that fatigues over time.Take the cover off,follow the power cord after it enters the housing to locate the fuse.

your power transformer for the magnetron could have a shorted primary power winding,the door safety interlock switch could be mis-adjusted,this normally blows the internal unit fuse,a shorted high voltage capacitor,or diode,a bare wire inside the unit,more than the microwave on that circuit or a weak circuit breaker in the house power panel

something wrong on the curcuit board, to much voltage

1. Check your circuit breaker for this m/w. Reset it.
2. Microwaves usually have 20A fuse inside. It could be broken.

I’m happy to help further over the phone at https://www.6ya.com/expert/vitaliy_f406165329c75ede

We had this problem. It was installed improperly - to recirculate instead of to vent.

Sounds like you could have a fauly control circuit. Something like when you press the pad the processor does not interpret the information correctly and resets itself. Or the power going to this circuit is being interupted. It is VERY dangerous to work inside of a microwave. So you could get an estimate from a repair shop. But those control boards are expensive. Do not attempt to repair this yourself. For your own safety.