Question about Samsung SMH7174BC Microwave Oven

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It has been working fine & suddenly seems louder and is not heating.

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Hi,
When a micro wave quits heating there can be a number of different issues that could cause it not to heat. Because of the way a microwave works it is best to have it checked out by a professional that knows how to handle the high voltages that can be present inside a microwave oven.

Here is a tip that I wrote about troubleshooting microwave ovens and explains things in more detail.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Posted on Sep 28, 2010

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It's probably a shorted high voltage rectifier diode or magnetron.

At our site, we have a video showing how to remove a typical over the range control panel assembly in under 5 minutes.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

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http://www.gallawa.com/microtech/mag_test.html
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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.

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Does it seems to run louder?

I would suspect a shorted high voltage rectifier diode.

We have the full service manual and have uploaded it to our site here.

Please feel free to contact me directly if you need more help.

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

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