Then use gator clips to put the diode in a series circuit with the battery to test … Touch the other probe to the metal magnetron housing. If the diode is burned out, the magnetron will not receive enough voltage to operate and the microwave oven will fail to heat. This could result in an inaccurate reading. By attaching the ohmmeter, the continuity of the resistance should be infinity. To test for the weak magnetron, connect one magnetron at a time and repeat Steps 1-4. a. Follow the below steps to test the performance of your microwave: Place a glass bowl (preferably a 2qt. Place a cup of water in the microwave. To test the magnetron RF power requires very specialized test equipment but it sounds like you are trying to repair a microwave oven. Take special caution to not touch the two probes together. Often the reason for this behavior of the microwave … Problem is in HV circuit. 3-9 amps = transformer is good. The Procedure for Testing the Diode, or Rectifier, of Your Magnetron: Get a nine-volt battery and insert the readers of your voltmeter as a standard. 10-14amps = all is good. Touch one of the meter's probes to a magnetron terminal. Attach your amp probe to the line splitter, plug in and run microwave 10-20 seconds. How to test a microwave diode. Using a multimeter to test magnetrons without powering them up is pretty straightforward.Note: I've read everyone's comments … This test should produce a reading of infinity - indicating … How to check the magnetron in the microwave . Before testing, you need to unplug the power terminal of the microwave oven. TEST 2: Set your ohmmeter to its highest resistance scale. Sometimes, when you're troubleshooting a microwave, it can be tricky to tell whether or not the magnetron tube is bad. The magnetron is more likely to fail than the capacitor. of water in the center of the microwave cavity. In Countertop Microwave: Usually It is mounted on top of the microwave shell near the magnetron Over the range Microwaves: Usually it is screwed directly to the magnetron. The water must be 59-75 degrees Fahrenheit (15-24 degrees Celsius). Unfortunately, every technology has its own life, and microwaves are no exception. And sometimes the device works fine, but the food remains cold. To test the thermal fuse control the magnetron, please disconnect one of the terminals of the fuse and check it for continuity with a multimeter. Sometimes we are confronted with the fact that it takes longer to heat up the dishes than usual. Before you replace the diode with a new one, you should … BE SURE TO UNPLUG MICROWAVE AND DISCHARGE CAPACITOR BEFORE WORKING ON ANY ELECTRICAL COMPONENT. This high voltage powers the magnetron to heat the food or beverage placed in the oven cavity. The RF testing kit would cost about as much as 500 new ovens so unless you are doing this as a business I would stop right now! This amperage test is quick, easy, accurate and safe. b.For ovens that contain 4 magnetrons (NE2180, NE3280), the temperature rise should be approximately 35o F per magnetron. Microwave Performance Test. For ovens that contain 2 magnetrons (NE1257R, NE1258R, NE1757R, NE2157R), the temperature rise should be approximately 70o F per magnetron. In the case with many GE microwaves, the magnetron can test good according to the filament resistance specifications yet fail when you're actually trying to get the damn thing to heat up … glass measuring bowl) with 1qt. This test is to check between the terminals of the magnetrons with an ohmmeter.

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