I have a very nice over-the-range microwave that died after 6 years of use (or after 8 months of renting to a very messy person). To replace with the same model used would be cost over $250, thus I decided to trouble shoot it.
If i place a cup of water in the microwave everything seems to work, but the water does not get hot.
I verified the mode stirrer rotates freely, and that it's motor actively turns when the microwave is on. The inside of the wave-guide, the motherboard, and the magnetron are surprisingly clean given the state the rest of device was in.
Because the magnetron is the most expensive part in the microwave, I'm a bit hesitant to order one and try swapping it out.
Are their any other parts besides the mode stirrer I should consider testing / replacing before replacing the magnetron?