1 Works great except loud buzzing
So so thought it was the diode replaced that.
It still heats food and water 1 cup in 60 seconds to boiling.
What's my next move ?
Capacitor ?
It's heating, so magnetron isn't the problem right?
Buzzing is constant soon as you start cook cycle starts within 3 seconds of pressing start.
Prior to this constant buzz it was only happening when magnetron was firing.
could tell because you'd see food or water boil when buzz was there .
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For example during a 4 minute or longer cook cycle. A year ago it would not begin buzzing within seconds of pressing start. It would only buzz when magnetron was hearing.
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5 
My microwave makes loud buzzing from start to finish, but it has always worked. To me, along with the abnormally loud buzzing, my microwave heats and cooks slow for its size. Everyone who comes over to visit me notices how loud my microwave is when i turn it on to heat something up, they mention how loud the buzzing soynd is .... and it scares them.
I know it's related to the magnetron's function because when defrosting food the loud buzzing comes on and turns off intermittently as food is slowly defrosted.
Recently, using my opened palm, I bumped the bottom side of my microwave a few times while it was operating to see if that would cause the buzzing noise to change and the next day the buzzing was noticeably quieter while running the microwave. Also seems to heat up and cook faster now.
por Rachel ☆