Question about Microwave Ovens

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My microwave was working fine on Sunday 100% power, on Monday light & fan work, tray rotates but will NOT HEAT at all? The unit is exactly 4 years old this year, what could the issue be? The microwave we replaced was 16 years old & still worked. Any help would be greatly appreciated. Model is SMH7174WC

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  • G.k. Mahendran May 09, 2008

    Now a days hot summer, due to voltage problem may not to be heating, try to put stabilizer and try again.


    Date: 09.05.2008

    ph: 97910 55855

  • bqb17 May 09, 2008

    THere is no addition noise, it sounds like normal just NO heat. I called Samsung, & they cannot help without the serial #, which is located on the back of the unit, which is mounted on the wall, r u kidding me? The magnetron is warranteed for 10 yrs, but does that include labor? They will not even send someone out without the #. Any advise? Is it worth it? It's only 4 yrs. old.

  • Anonymous May 09, 2008

    My microwave was working fine at 3:00 p m. then at 5:00 p m I was going to use it, and the start button would not work when I touched it. My microwave is a Kenmore



    The time was on May 8th, 2008

  • nepatobins Dec 01, 2008

    My Samsung SMH7174WC failed with same symptoms after spouse boiled down an entire glass of water by mistake. Everything appears to be normal, but not heating.

  • William Miller
    William Miller May 11, 2010

    Since the fan, light and try work, it's most likely a failed part or bad connection in the high voltage section, such as at the magnetron terminals.

    Is the noise it makes when it's supposed either quieter or louder than when it was working?



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To bqb17:

Samsung will only cover the cost of the magnetron (if that's the trouble) but they will require you to pay the service call labor (maybe $75) and on-site repair labor (maybe $50-90).

You can save a little by removing it from the wall yourself and taking it to the servicer. They would likely charge a bench fee of about $25 to check it out.

Are you sure the serial # is not located on a tag around the door frame or inside?

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

To guest:

Your oven's failure to start isn't the same problem bqb17 is having. His starts, it won't heat. So it would have been better to post a new thread.

But even so, I would suspect you have a bad door switch or door switch mount. Forget any talk about a "voltage stabilizer".

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa:

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

Posted on May 09, 2008


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