Question about Samsung SMH7178STD Microwave Oven

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Samsung Microwave. I put the time on 25 minutes and cut the microwave on and came back and have no power.

I put the time on 25 minutes and cut the microwave on and came back and have no power.

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  • 9,098 Answers

Chances are the thermal cutout / thermal fuse or thermostat on or above the magnetron has failed.

Hopefully it did its job and protected the magnetron from destructive overheating...

If you or someone you know wants to look into this, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on Apr 20, 2008

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Microwave would cut off after a few minutes and then turn back on but now there is no power at all.


There are few reasons for this fault, but the main is that you need to open your microwave oven and first check the Fan which is connected at the back which cools the magnetron.
If this fan fails thus results in magnetron being overheated and the thermal cutoff gets open circiut and shuts down whole power of your microwave oven.
Check your fan motor test it straight with direct power
Also check the thermal cutoff.

Let me know after you have done those checkups



Regards
Ashwin

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The microwave keeps cutting out after 2 to 3 minutes and you have to wait 2 minutes for it to come back on again.


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