Originally Posted by bend302
Try it...I put my cellphone in my microwave oven and it could not get a signal enough to receive a call. Opened the door and it worked. Since the microwaves from the phone tower could not get to the phone I assume the seals are good.
Now, the next test (urban legend) is to see if your CMO will light up a flourescent bulb. That is supposed to mean it's a leaker but I'm not going there
my heathkit microwave had neon lights to indicate cook, door open, etc. when it leaked, those lights would randomly flash.
the door is abt the only place u can get a leak. it isn't going to come thru the glass area because of the metal perforated shield in there. the glass is there to keep u from pushing metal thru the screen and creating an antenna to the outside world.
the area around the door is protected by a capacitive shield (the Teflon coated metal area around the (parimeter of the) glass area that fits next to the oven cavity). the next shield is a square channel on the flange area of the door that fits next to the flange of the door cavity. this inverts the microwave energy and cancels it. the heathkit also had a conductive vinyl shield that resembled a gasket that fit around the door and next to the cavity. the only thing i've seen the vinyl on is the convection/microwave (lately).
for the protection to work, it is to remain undamaged and clean. it isn't likely ur going to bend the door but if u do, u have a possibility of a leak.
your microwave light and fan coming on when it shouldn't most likely is going to be a problem with the control panel. you have to have at least 3 things go wrong for the magnetron to activate: 2 independent switches must fail and the timer must tell it to come on. or one thing common to all; the logic circuit that reads these failures has to fail.
i doubt that it is repaired by resetting. it will only get worse. had that with a sharp (the light and fan came on but not the magnetron). started out every once in a while and progressed to staying on.
if the person making the repair is told abt the problem, they should take it seriously even if they can't find a problem.