First, I read the PartsSelect DIY report by Linda, Warsaw, IN. With confidence, I purchased the magnetron. Upon receipt, I took the built-in microwave out of the cabinet, set the unit on the kitchen floor, and was stopped cold by the Safety Torx nuts on the reverse of the unit. Borrowing the right wrench allowed the 20 minute start-to-finish part changeout and reinstallation of the unit in the cabinet to proceed. The old magnetron was the defective part. Discovery of the 10-year Parts-Only warranty on the less than 10-year old unit was insufficinet to guide me to take the unit in for their Labor bill to repair. New part in hand, it just was that easy - and assumed to be no less expensive.
Take the four saftey torx screws off the back of microwave that hold the side panels on. There are no screws in the front. Just pick up the side panels a little and slide towards the back of microwave and it will come off. The magnetron is visible behind control panel. Unplug the magetron, take a 3/8 nut driver , remove the one bolt that holds it on , remove and replace with the new one. Plug the wire (it will only go one way) back up and replace cover.
I just took off the cover, located the magnetron, replaced it and slapped everything back together and since then everything's been working pretty good.
