Mt-Bike for Model Number Whirpool GMC305PDQ2 When I push the start button, the Microwave will run (and heat)for 3 sec, then turn off. Push start again, and it will do the same. I verified all the door switches are good. I was told it could be the magnetron, and wanted to see if that makes sense.
Answer Mt.bike, Yes, it could be the magnetron W10245183 as well as a weak capacitor WP4375020, or transformer WP4375286 . We'll send you some information, so you can tets and determine which component(s) have failed. Read More... Answered by AppliancePartsPros.com | Monday, July 9, 2012