Yihe for Model Number KEMC308KSS04 Hello My microwave has no heat but everything else is fine. I did test on diode, HV capacitor, magnetron . All are good. here are test results. 1. diode:.applied 9V. there is 200mA current and voltage is 6.2V. if i revert the polarity of the 9V. There is no current and output. I did order a new diode, but i still not get the heat after installing the diode. 2. capacitor: i measured, the capacitance is 1.08uF which is in the range of 1.05+/- 3%. the resistance is 10Mohms which matches the specification. 3. magnetron. the resistance between terminals are 0.8ohms. Both are open to the ground. 4. HV transform. it has 5 wires. two wires on input side and three wires on output side. The resistance between two inputs are 0.5ohms. they are connected to magnetron fuse and interlock switch. Both are open to the ground. the three wires on the output side are one white and 2 oranges. the white is connected to HV capacitor alone. one orange is connected together with diode and magnetron on the other end of the capacitor. the other orange wire is connected to magnetron. The resistance between white and GND is 80ohms. The resistance between two orange is 0.5ohms and both open to the ground. After all these measurements. i could not isolate where the problem is. Could you shed some lights here? many thanks
Answer Yihe, you will want to test the magnetron thermal cut out WP4375079 for continuity to ensure that is has continuity. From there you will want to test the door switches W10211972 for proper operation. The door switches would need to be tested for continuity when engaged and disengaged to ensure that the contacts are opening and closing as shown on the side of the switches themselves. Read More... Answered by AppliancePartsPros.com | Thursday, May 16, 2019