The oven just stopped working. No power, no display on console. Changed one fuse (15 amp ceramic fuse). Power came back on but as soon as I pushed button to heat, the fuse is blown again. What is the next step? Thank you for your help.
Check monitor sw which is NC if faulty replace. If ok change Mag/diode. 
Check monitor sw which is NC if faulty replace. If ok change Mag/diode. And by the way disregard the other persons comment about chking the CAP you hardly ever need to change. The cap. is a Hi-voltage piece be sure you discharge it correctly or it can really hurt. (40,000 vlts)
Check monitor sw which is NC if faulty replace. If ok change Mag/diode. And by the way disregard the other persons comment about chking the CAP you hardly ever need to change. The cap. is a Hi-voltage piece be sure you discharge it correctly or it can really hurt. (40,000 vlts)
agdixx, you don’t sound very familiar with how a microwave works. Yes a monitor switch will cause a fuse to blow, but a bad monitor switch will blow a fuse when you close the door…In rare cases a magtube can blow a fuse, but in my 10 years I have yet to see a magtube do this… After 2 seconds of hitting start that is when the high voltage side of the Microwave is activated, a shorted capacitor (which is not that rare) will kill the fuse as soon as the high voltage side is activated…2-3 seconds from hitting start. The transformer if shorted will trip the house breaker A BAD CAP WILL BLOW THE FUSE and is NOT that rare. Most the time after 2 seconds of start up, a bad cap will make a loud buzz just prior to the fuse going out.
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agdixx, you don’t sound very familiar with how a microwave works. Yes a monitor switch will cause a fuse to blow, but a bad monitor switch will blow a fuse when you close the door…In rare cases a magtube can blow a fuse, but in my 10 years I have yet to see a magtube do this… After 2 seconds of hitting start that is when the high voltage side of the Microwave is activated, a shorted capacitor (which is not that rare) will kill the fuse as soon as the high voltage side is activated…2-3 seconds from hitting start. The transformer if shorted will trip the house breaker A BAD CAP WILL BLOW THE FUSE and is NOT that rare. Most the time after 2 seconds of start up, a bad cap will make a loud buzz just prior to the fuse going out.
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Wow, 10 years thats empressive. I repair over 200 OTR microwaves a month. Ive had a monitor sw trip a breaker before. As for a shorted capacitor havent really had one blow a fuse. But Ive had a faulty diode cause this problem. And thats enough to mess up a Mag. The buzz sound comes from a Mag because of a bad diode.:eek:
— Begin quote from agdi4xx;49752
Wow, 10 years thats empressive. I repair over 200 OTR microwaves a month. Ive had a monitor sw trip a breaker before. As for a shorted capacitor havent really had one blow a fuse. But Ive had a faulty diode cause this problem. And thats enough to mess up a Mag. The buzz sound comes from a Mag because of a bad diode.:eek:
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How can you sit there and say you have never seen a shorted cap blow a fuse:confused: and a faulty diode cause a fuse to blow:confused: So tell me what happens when a cap shorts, curious? and show me a diode that takes out the fuse when it goes bad, and I will buy you a beer. How does a monitor switch trip the house breaker unless the fuse to begin with is oversized, or they have a weak breaker. Based on your previous posts, you have taken everything I have learned about microwaves in my 10 years and thrown it out the window. Amazing