Gil for Model Number Whirlpool WMH76718A0 Micro will not heat...But I Do Not have a buss sound or any noise...it operates, just does not heat. When we initially hit the start button, SOMETIMES there is a small spark. DO I need a diode , a magnetron, or both?
Answer Gil, You will want to check the door switches to make sure that they are good. If the door switches are good the test the magnetron for less than 1 ohm of resistance. If it is not less than 1 ohms then it is faulty. Read More... Answered by AppliancePartsPros.com | Wednesday, March 28, 2018