Repairman just diagnosed mine as a bad display board, it quit working while nobody was even home, and cost $269 with a $70 service fee. The microwave is less than 2 years old and only cost @$400 new. I was lied to by the salesman when I made the purchase (imagine that, a salesman lied to a customer) he told me these were very good and reliable microwaves and that I should get years of service out of it, what a crock... I will never buy another Samsung appliance again, they have many many bad reviews and are made with inferior parts. I will stick with Kenmore kitchen products from now on!!!
I decided to tear the microwave apart just for my own peace of mind and found the problem. It turned out to be the thermistor on top of the magnetron. It was a factory bad part that worked until it didn't. So now I have a extra motherboard and a working microwave. The thermistor cost between $7 and $8 dollars online.
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SOURCE: Samsung Microwave model # SMH7178STD just stopped working.
This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.
Even though a door switch clicks, it may still be bad inside.
If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk
You can find Samsung-specific parts here: http://www.samsungparts.com/search/search.asp
SOURCE: Samsung Microwave
You may have a blown internal fuse. You''ll need to unplug the unit, remove the outside cover and follow the line cord and you should find the fuse.
Replace it with the EXACT same value that was labeled on the original fuse. You'll probably be able to find a replacement at any Radio Shack store or hardware store.
Replace the cover and plug the unit back in. Hopefully nothing was damaged and the unit will play again.
Please let me know if I can be of further assistance to you.
Good luck!
- Jim
SOURCE: Samsung C100 microwave is now dead
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SOURCE: SAMSUNG MICROWAVE, MODEL SMH9187ST, WHEN NOT
Hi dschema,
You have a door switch issue. There are three behind the panel. If you can lift and hold the door and it starts one of them is bad for sure. You would be better off replacing all three or have a repair man replace them because a microwave can hold 3000v even unplugged.
Hope it helps.
Thank you for using FixYa.
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