everything works but will not heat ,could the compcsiter be bad and how to test
Michael H for Model Number jvm1440bh01
Answer Michael, When the capacitor or diode fail, there is usually a loud hum or growl noise from the microwave when the magnetron tries to heat. To test a capacitor, you have to remove power to the microwave, you'll need to discharge the capacitor by placing an insulated screwdriver or pair of pliers across the capacitor terminals, and mark and remove the wires from the capacitor. Using a multimete,on the lowest resistance setting, place the meter probes on the terminals. If the capacitor is "good" the needle or digits will increase in resistance, momentarily, and then reduce back down towards an "open" circuit. Good Luck and Thanks