Woke up this morning and nothing works. Power is good at the plug, so I am not sure what happened . Zero power . Any help would be great. THX
Answer Chris, You will need to unplug the power cord, remove the upper vent grille then remove the screw holding the control panel to the microwave front panel, and lower the panel. You'll need to check the in line fuse W10422951 and the magnetron thermostat 4393943 for "closed" circuits with a meter and replace which ever part is "open". If either part has an open circuit, power to the control board is eliminated, and the microwave is inoperable/ "dead".
Hello, I have a Kitchenaid KHMS145JBT0 that stopped working. Lights and fan work but seems to click a few times after you try to cook. Turntable or power doesn't seem to come on but the light does. I ran the test and all 8 came up except Easy Simmer came up with Hm 574. Would I need to replace the computer control board, touch pad or maybe the magnetron? Thanks, Tony
Answer Hello Tony,
You should test the humidity sensor. This is the code that showed up on simmer. If it tests good, you need to test for 120Vac on the PRIMARY side of the high voltage transformer with the unit turned on. If the 120Vac is not there, the board is the most likely cause of the failure. If it is there, you should remove the unit from the electrical power supply, discharge the high voltage capacitor, and test the high voltage transformer as per the tech sheet.