I have a GE microwave JVM1440BD003 that will not heat. I found a thermal cutout (not sure if that is the official name) that is open, so I think that is my issue. The problem is the parts breakdown I can find online is not very clear. There are a couple of parts and I am not sure which one I need. Does anyone have a service manual or any ideas how to narrow it down? I think it is either a WB27X10166 or WB27X10194 or maybe a WB27X1127 or WB27X10195. I have a picture of its location if that helps. It is on the vertical panel, so I think it is for the magnetron.