Question about Samsung 1.8 Cu. Ft. Over-the-Range Microwave

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Will not heat and the truntable will not run

Model SMH7187STG

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  • 9,047 Answers

It's almost certainly the primary interlock (top door switch).

See this file for details on checking and replacing door switches.

You can also see the video at our site, which shows you how to access the door switches.

We have the service manual for the model SMH7178STE here, which should be pretty similar. It will also help you with disassembly.

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

Posted on May 06, 2010

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Posted on Jan 02, 2017

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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.

Dec 20, 2016 | Samsung Microwave Ovens

1 Answer

Microwave JVM1441: looks heating okay but making like rattling scary sound


This can be sparking or ratiling from the truntable mechanism or motor. If there is spark please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is leaking and sparking to the ground. As you have mentioned it was stored, it is quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off.
Now keeping clear switch on , use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.

Finally check the turntable , a drop of oil can stop the noise , remove the bottom plate to access. If there is heating without any issues , you can use the microwave safely

Jul 06, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

My Samsung microwave model SMH7187STG 1.65 KW is showing error message E-13


E-13 T1 Max time error (oven did not preheat properly). This can be due to improper power line voltage, a failing thermistor, a bad damper seal, or possibly a faulty control circuit board. I would first verify proper operation with the manual, then if it still acts up and if it's in warranty, I would contact Samsung support. But if it's out of warranty and works okay otherwise, it may not be serious enough to worry about.
Hope this helps.

Oct 31, 2010 | Samsung Microwave Ovens

1 Answer

The lights work, the truntable does no turn and there is no power to the motor. FMV156DB


Hello there:
The carousel won't turn Although the carousel is usually driven by a small motor that's unrelated to the heating function of the microwave, the microwave cabinet needs to be opened to repair it.. Inspect the plastic drive coupling that the tray sits on, as well as the ring-and-roller assembly, to make sure that they're working properly. if not replace it and check all of the wiring to the motor with a meter to see if there is any continuity to it if not there is a problem with the motor itself or the wiring harness ok?

Sep 26, 2010 | Frigidaire FMV156D Microwave Oven

2 Answers

I need a schematic for an over the range microwave door in order to replace the handle. A samsung model SMH7187STG


Do you have the new handle already? I need a whole new door due to a scratch and will have a new handle from the scratched door that I wont need........

Oct 25, 2009 | Samsung Microwave Ovens

1 Answer

Microwave Spacesaver #JUM 2050BH001not heating


HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

(((The fuse is located inside the unit along side the magnetron)))...

Sep 27, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Killed the microwave by running it empty for 30 minutes.


YES THERE IS AN INTERNAL FUSE OR DIODE YOU CAN CHANGE, BUT YOU SHOULD BE CAREFUL AN LET A PRO DO IT, YOU JUST DON'T WANT TO GET ZZZAPPPP WITH THE CAPACITOR THAT STORAGES HIGH VOLTAGE INSIDE TO PROVIDE THE MICRO WITH POWER, IT MAY SEEM LIKE A LIL UNIT BUT IT CAN HURT YOU IF YOU DONT DE-ACTIVATE IT RIGHT, NOT SURE IF THE DIODE WOULD BRING IT BACK BUT CHECK WITH A SERVICE MAN, BEFORE DOING ANYTHING I WOULD!

May 28, 2009 | Samsung SMH7178STD Microwave Oven

1 Answer

Replace broken door handle model No.smh7187stg


You have to separate the door panels (as shown in the attached photo) and then you'll see the previously hidden screws you need to remove.

Or you can watch a YouTube video (not a video I made) here that demonstrates how it's done.

You can order Samsung parts here.

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

Aug 30, 2008 | Samsung Microwave Ovens

1 Answer

GE JVM1650 truntable noise


Sounds like the turntable motor is going bad.

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

Nov 18, 2007 | GE JVM1650 1000 Watts Microwave Oven

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