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Microwave oven will not work

I have a samsung MR5493G in my 2002 Coachmen RV. The touchpad has recently stopped working. How can I repair/replace? Display keeps showing " Samsung-Simply-50". ???

Samsung microwave oven (MR1032BB) Can't set the clock after resetting main breaker. Microwave starts on its own and adds time to the run. All touchpad sensors seem to be lock out.

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Check the manual for child protection...from what i can remember you hold 0 and press 1.

Posted on Jul 09, 2008

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Seems like I've answered this before, but the MR5493G is subject to a recall due to defective keypad (membrane switch) and can be seriously dangerous.


The MR1032BB is also under recall. See:

If neither is covered under the recall, you should be able to order new keypads here:

If not, we'd be happy to help you. You'll find a link to our site in our listing here on FixYa:

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

Posted on Feb 19, 2008


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  1. Main control boardIf your microwave runs for a few seconds and stops, the first thing to check is the main control board to ensure that a shortage has not occurred. If the part is defective then it will need to be replaced to prevent continual shut offs. If this is not the issue, the next step would be to check for a faulty touchpad.
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>> We also tried plugging our toaster into the microwave plug outlet, and the toaster wouldn't work in that outlet, but worked just fine in a different outlet in the RV.

This means the outlet you plug your microwave into needs to be fixed in addition to fixing the oven. Breaker? Fuse?

>> I understand from another RV forum that microwave ovens for RVs have "special circuitry and cooling features" not found in regular countertop ovens for household use.

Not really in my experience. Any microwave supplied with clean AC power and proper venting space will be fine.

But I'd bet your microwave can be fixed affordably.

The main internal things which can result in this model being dead (no display, no light when you open the door, no beep when you press a pad on the keypad) would be the 20A fuse and the magnetron temperature fuse. There could also be bad connections on the noise filter board.

Also, sometimes a power surge can cause the power to be interrupted to the low voltage transformer on the board, and I regularly repair those boards. I can also write a technical statement to your insurance company or to an RV park as needed.

At my Web site, I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

The relevant service manuals for this model are here and here.

You can order Sharp parts from Sears or Encompass.

Contact me directly if you need more help.

- William E. Miller, AS-EET
Microwave Oven Control Panel Repair Nationwide "Recycling by repairing since 1982"

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