Appliance Repair Questions? Ask a Technician for Answers ASAP
Were there any noises, when the microwave tripped the circuit breaker?
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I had a friend here and he had plugged in a battery charger for his cordless power tool,
I know it said 19 amp on top and it was plugged into an outlet for the same circuit
breaker as the microwave. The refrigerator and dishwasher are on the same circuit
and we have never had any trouble until the day he had that charger plugged in.
Also I am going to be in and out all day, so my responses will be slow, I apologize.
OK. Thank you. The noise is generated by the transformer in the magnetron power supply circuit, when it fails and short circuits to chassis ground. The oven is dead, because the fuse that protects the control board opened to keep the board from being damaged.
The transformer will need to be replaced, as will the fuse. The part number for the transformer is(NNN) NNN-NNNN and the price is $76.85. You can buy it at www.repairclinic.com. You can buy replacement fuses at any good hardware store.
You can locate the fuse holder by removing the oven cover, and following the black wire that connects to the power cord.
Okay. So how to remove the oven cover. Its an over the stove model attached to the
wall, do I have to take it down?
Unfortunately, yes. The U shaped cover fits over the sides and the top, with hold down screws along the back edge, and in some cases, along the bottom edges on the sides.
When all those screws are removed, pry the sides out at the rear bottom, and lift the cover up and back toward you. The cover usually has slots at the front that fit into tabs on the frame. It's similar to removing a cover from a radio.
John. You online. I am finally able to work on my microwave.
I thought that I would try the fuses first, got power and sounded normal for about
5 seconds and then went dead. So transformer first, then fuses, huh?
They are out of stock until at least Nov 30th.
But am I on the right track?
Did you hear any unusual noise while it ran for the 5 seconds, and did the inline fuse open again?
No unusual noise. Thought I was going to have a cup of tea. But then it went dead
again. Did not trip breaker, just went dead, assuming the fuse?
I guess so. There were two of them that I replaced. Like an inch long, looked like
regular fuses except you couldn't see through them.
Hardware store said it was the right one.
Okay. Thats kind of what I was thinking. I am going to just buy a new microwave. If that part is $76 plus shipping and we don't even know if its the right one, it could be just as
cost efficient to go with a new one. I think I will actually get a smaller one, this one is a monster. Much appreciation for your honesty and assistance.