Question about Samsung SMH7178STD Microwave Oven

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Samsung microwave My microwave completely shuts down after about 5 minutes.

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  • mazie c Sep 16, 2008

    Yes, it does go dead and then comes back on in about a half hour. Now that you mention it I don't think the internal cooling fan is running. It does sound different but I couldn't figure out why. Is that expensive to fix?

  • mojosgr8 Jan 12, 2009

    my samsung smh7150be shuts down after just a few minutes. It completely shuts off and then comes back on after about a 1/2 hour.

  • William Miller
    William Miller May 11, 2010

    Is the internal cooling fan running while it is cooking?

    (I don't mean the hood exhaust vent fan that you can turn on and off at will )

    Is it going "dead" with no display, then coming back on (with clock not set) in a few minutes?

  • Anonymous Mar 17, 2014

    I JUST SENT THIS REQUEST 5 MINUTES AGO AG

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I have a Samsung model 1032BB in my R.V. Starts up all by itself and then I can't turn it off/on; have to unplug it. Should I have it repaired or should I replace it?

John

Posted on Dec 09, 2008

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Sounds like the fan is out, and it's overheating the magnetron, then the thermostat trips to protect it.

You can order Samsung parts (and check prices) by entering your model number here.

If your model is SMH7178STD the fan motor (without blade - you use the old one) is $27.69 plus shipping.

You can find your nearest Samsung-authorized service center here.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

At our site, we now have a video available showing how to remove a typical control panel assembly in under 5 minutes. Once that is out, you can see the innards pretty well.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Sep 16, 2008

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RE: Samsung microwave SMH7187STG mfg'd 5/08. I heated cup of tea 2 min.Then I closed micro's door & micro emitted a continuous electrical buzzing sound.I opened door & buzzing stopped.


The cook relay on your control board is shorted, and the unit is cooking whenever you close the door.

When the magnetron overheats, its thermostat opens, shutting power down until the unit cools to a safe level, then power is restored.

I regularly repair these with my $54.95 service, which includes insured return shipping.

Details are here, or for full information and instructions, please e-mail me here at pupista@gmail.com and remind me of your full model number and symptoms.

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It sounds like the thermal fuse may be defective, or the fan is not running, or the magnetron is getting to hot. If there are any heat issues the thermal fuse will cut power and reset in 5 minutes.

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During cooking, the microwave will work for about 3 minutes then completely shut down.There appears to be a complete power failure.After the units sits for about 5 minutes,it resets itself and you can cook...


sounds like the cooling fan has came adrift or stopped working , this will cause the magnatron ( the microwave generator ) to overheat tripping the over temperature stat ,so fix the cooling , but be sooooooooooooo carefull in there , microwaves + really high voltages , not really a job for a non electrician/microwave tech

Oct 20, 2009 | Samsung SMH7178STD Microwave Oven

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Microwave not heating, but does count down minutes.


Press clear/reset button and hold 5 seconds. If this doesn't work unplug unit or shut off breaker for 10 seconds.

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Samsung smh7150 shuts down after a few minutes.


If the mag overheats because its not being cooled it will shut down until its cool.

If the fan is turning slow you can try oiling it but it likely needs replacing.

Another thing that causes this is that the exaust port is blocked because its upagainst the wall and the hot air can not escape.

Jan 12, 2009 | Samsung SMH7178STD Microwave Oven

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Microwave oven shuts off after one minute


This is a problem in one of the damper-related components, most likely the switch, but it may also be the motor or the damper door.

The damper is a door inside that opens or closes depending on cooking mode. If the controller senses that the door is not in the right position, it will shut down the cook cycle.

Sharp models stop after 59 seconds.

See the attached sample photo for a typical damper assembly.

What is your model number? We may be able to point you to the full service manual too.

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

The best place to order parts for this brand is Tritronics. Or you can call them toll-free at 866-779-5835. Their Web site re-opens tomorrow.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

eedd501.jpg

Dec 30, 2008 | Sharp R-1874 Convection/Microwave Oven

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Microwave shuts down after cooking three or four minutes


Your magnetron is overheating and tripping the thermostat, which interrupts power until it cools.

Since it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

You can find your nearest Maytag-authorized servicer here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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