Question about Samsung SMH7178STD Microwave Oven

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SMH7178STD Not working properly

When pressing some of the sensor cooking buttons like "bevarage" the oven starts working but after 3-4 seconds it stops, displaying "E 4".
What could I do?

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E4 means your thermistor (temperature sensor) is shorted or caked with grease, making it look shorted.

Normally you can get Samsung parts here:

But that part does not show up on a search so you'll probably have to call them:

J & J International, Inc.
311 Route 46 W, Suite E
Fairfield, NJ 07004
Tel 800.627.4368
Fax 973.276.9078

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

Posted on Feb 09, 2008


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Posted on Jan 02, 2017


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I didn't try to clean up the copy
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simple to fix up your self please follow this instruction below
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  2. Step 2 Set the clock by pressing the "Clock" button.
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  5. Step 5 When the time and minutes are set, turn the dial again for a.m. or p.m. Then you will need to press the dial in to save the settings.
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thank you for using fixya.

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