3-9 amps = transformer is good. of water in the center of the microwave cavity. 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 … Attach your amp probe to the line splitter, plug in and run microwave 10-20 seconds. 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! For ovens that contain 2 magnetrons (NE1257R, NE1258R, NE1757R, NE2157R), the temperature rise should be approximately 70o F per magnetron. Unfortunately, every technology has its own life, and microwaves are no exception. This test should produce a reading of infinity - indicating … 10-14amps = all is good. The water must be 59-75 degrees Fahrenheit (15-24 degrees Celsius). Often the reason for this behavior of the microwave … Sometimes, when you're troubleshooting a microwave, it can be tricky to tell whether or not the magnetron tube is bad. glass measuring bowl) with 1qt. How to check the magnetron in the microwave . Before you replace the diode with a new one, you should … And sometimes the device works fine, but the food remains cold. If the diode is burned out, the magnetron will not receive enough voltage to operate and the microwave oven will fail to heat. Take special caution to not touch the two probes together. Touch the other probe to the metal magnetron housing. The magnetron is more likely to fail than the capacitor. This test is to check between the terminals of the magnetrons with an ohmmeter. 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. Using a multimeter to test magnetrons without powering them up is pretty straightforward.Note: I've read everyone's comments … Touch one of the meter's probes to a magnetron terminal. 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. Before testing, you need to unplug the power terminal of the microwave oven. Follow the below steps to test the performance of your microwave: Place a glass bowl (preferably a 2qt. This amperage test is quick, easy, accurate and safe. Sometimes we are confronted with the fact that it takes longer to heat up the dishes than usual. How to test a microwave diode. Place a cup of water in the microwave. Microwave Performance Test. BE SURE TO UNPLUG MICROWAVE AND DISCHARGE CAPACITOR BEFORE WORKING ON ANY ELECTRICAL COMPONENT. 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. This high voltage powers the magnetron to heat the food or beverage placed in the oven cavity. b.For ovens that contain 4 magnetrons (NE2180, NE3280), the temperature rise should be approximately 35o F per magnetron. This could result in an inaccurate reading. Then use gator clips to put the diode in a series circuit with the battery to test … 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. TEST 2: Set your ohmmeter to its highest resistance scale. Problem is in HV circuit. To test the magnetron RF power requires very specialized test equipment but it sounds like you are trying to repair a microwave oven.
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