STIRRER ASSEMBLY

First called for a repairman. They didn't work on any thing over ten years old because "parts are not available". They would look at it for $86.00 service call. I found a video on You Tube that gave a good description of the problem and how to repair.
I first looked in the oven and found no bare metal that would cause the problem. I then removed the Stirrer cover and stirrer in top of oven where I discovered that the stirrer had been arcing to the cabinet. Easy fix. I sanded down the damaged area to clean metal then repainted with microwave paint. I installed new stirrer Part Number PS2343147 and replaced Stirrer Fan Cover. Microwave works like new.