Making loud Hum when not on, but plugged in.
Samsung SMH2117S Microwave started making a loud hum a few days ago, I unplugged it over night and left it, plugged it back in the next day and still a loud hum, the hum stops when you open the door. As soon as you close the door, without pressing any buttons or starting the microwave the hum comes back. I took the microwave down from above the range, removed the cover to try and pin point where the noise is coming from. the hum is coming from the Magnetron. The unit will still heat food, and everything else seems to be working as normal. I don't really feel like it is safe to leave plugged in or even use. I have found a price on a new magnetron for this product for $115.(i live in canada) i have no problem buying a new one and replacing it. But i want to make sure that is the real problem.