I believe I need to replace the magnetron. Can someone direct me to some directions on how to get at it. I need some directions before I purchase a new one.

The microwave shuts down in 3 sec , but if I put it a 0 power it will run forever. I read here that it may be RF leakage from the magnetron

Thanks for your help
MikeB.

OK, so the symptoms are: microware runs and heats for 3 sec and then shuts off as if the door was opened. If the microwave is on 0 power, it will run forever. It is only when the magnetron kicks in that the unit will turn off

I replaced all 3 door switches and the magnetron. I checked the magnetron thermal switch and it is good. I am tired of throwing parts at this thng, but what else could it be. Next I was going for the capacitor. Any help would be appreciated.

Thanks

MikeB.

Simon - Thanks for the reply. Yes, the blower motor is working. I did verify the magnetron thermal cut-off is working (actually cuts off at about 170F - 180F Vs the 145F per spec). I did not verify the cavity thermal cut-off.

What would cause the relay to cut out? Most relays will fail to pick or fail to release. In this case, it will pick for 3 sec and then release.

Also, it seems that after I have worked on the unit, when I first power it up, all is good. I have run the unit for 10 mins w/o any issues (I put a few cups of water water in the microwave and it heats up just fine) It is the next day that it starts acting up again.

Thanks
MikeB.