Continuity checks showed the flame sensor was open. Schematic notes it opens at 217 degrees and closes at 30 degrees. Removed sensor and placed in freezer for twenty minutes. Tested sensor and it was now closed, reinstalled and microwave worked normally. Ordered new sensor in case the original is operating at too low a temperature.
I took the cover off and followed the electric current to see if it got as far as the display. I did not get past the thermostat shut off where the current stoped. I jumped the thermostat and the unit worked. The part was so inexpensive that I decided to replace it rather than try and freeze the old one in hopes of "reseting" it.
A fragile glass tray providing a rotating surface for the microwave required replacement. The tray arrived scrupulously packaged to insure contents production. Unpacking was simply accomplished and installation achieved without undue effort. Thank you for prompt delivery and consideration for the attention paid to my purchase.
