Question about Samsung Microwave Ovens

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No power was using think it beeped then had no power no nothing tried unpluging nothing works power is running in the microwave line checked.

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A microwave can be dead for many reasons.

It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.

If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

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.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

If not, please reply back with your brand and model number so we can help you better.

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

Posted on Aug 19, 2008

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Whirlpool Microwave Hood Combination MH3184XPS-0 (October 2004), for no reason at all, this morning keeps beeping and running the power setting down from 10 to 1, and just keeps doing it in rapid sequence....


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From what you have described, it appears that the microwave oven works fine, except that the beeper doesn't work like it used to.

This could be caused by a couple of things.

First, there is typically a piezo electric speaker that creates the "beeping" sound. It's possible that this part has failed. It's a mechanical device and can break. This part is relatively inexpensive.

The piezo speaker is controlled by the microprocessor board. It's possible that there is a problem with one of the output lines from the microprocessor that is tied to the speaker.

One way to determine which part is defective, is to try connecting another speaker in parallel across the original speaker, or remove the original and try the replacement (least expensive method).

If there still is no sound, then I would suspect the problem is on the microprocessor board. (most expensive method).

If I can be of further assistance to you, please let me know.

Good Luck!
- Jim

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