Hi Joe,
The first thing I would test is a secondary interlock switch (#2 on the
latch board break down diagram)
If the switch is fine then the question is: does your microwave make any unusual noise?
If it does then most likely the problem is a shorted rectifier (#9 on
the magnetron and the air flow break down diagram) or a shorted magnetron tube (#1 on
the magnetron and the air flow break down diagram. If there is a continuity across the rectifier terminals (using a regular meter) - it has to be replaced.
If there is a continuity between any of the magnetron tube terminals and the body of the magnetron tube - it has to be replaced.
In case if the high voltage transformer shorted out, in most cases it should produce an electrical burning smell and a smoke.
- The break down diagrams for the Whirlpool microwave
Model MH7130XEQ1
- The part number for the door interlock switch kit is
AP3109474
- The part number for the rectifier is
AP3955781
- The part number for the magnetron tube is
AP3081175
- The part number for the high voltage transformer is
AP3081176
Good luck.
Gene.