Rank: Member
Groups: Registered
Joined: 4/22/2008(UTC)
Posts: 3
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Touch pad, turntable, fan, lights, all work but it will not heat. It loads up as if it were heating with a somewhat louder humming noise. I have replaced the Magnatron but with no results.(waveguide shows some discoloration from heat). With door closed i have 2 door switches with continuity and 1 without. All heat sensors appear to be working. I checked for continuity of the HV capasitor (two treminals)and got nothing. and on the HV Diode(does not appear to have been hot, nor blowing fuses) and got a reading of 16.6 BOTH ways. Can you suggest a cure? THANKS
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Rank: Member
Groups: Registered
Joined: 4/26/2008(UTC)
Posts: 1
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you will not get any continuity at the capacitor you need a capacitor tester for accurate measurements, if you replaced the magnatron and have a loud humming noise is either coming from capacitor, or diode, but you might have a bad transformer in theat case it really sound loud, i would replace the capacitor it is the biggest issue on GE maicrowaves they are usually 92 uf, but you can use a QB capacitor, do not go any higher than 5 uf over, plus the QB parts are lots less in cost than manufactures parts.
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Rank: Member
Groups: Registered
Joined: 5/7/2008(UTC)
Posts: 1
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Replace the HV diode,.....should fix your problem
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Rank: Advanced Member
Groups: Senior Expert
Joined: 5/28/2008(UTC)
Posts: 1,620
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Always replace the HV Diode when changing a mag tube. Also if you have a burn mark on the wave guide, the new mag wont last very long. Did the end of the old tube look melted and burned?
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