Marnetron number is 2M248J(GS). The bottom number is 6M 14 36 does this number matter?
Answer Dwight, the manufacturer replacement magnetron for your Whirlpool Microwave model GT4175SPB2 is part number R0131296. This is the manufacturer replacement magnetron and will work on your appliance. The numbers on the magnetrons shouldn't make a difference at this time. Thanks!
My Whirlpool microwave oven works on everything except it is not heating. What do you think is the problem?
Answer Hello Cesar! If the microwave is not heating it could several different parts. The main parts you will need to look at and test is the magnetron R0131296, transformer W10170369 and high voltage diode 8205489. You can test the parts using a multimeter TJMA-DM1. Here is a link from our free repair forum you can refer to for help with using a multi meter. Hope this helps, thanks! http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html