Question about Maytag MMV5186A Microwave Oven

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Slow Heating We ahve a maytag MMV5186AA above counter microwave.  Recently it has been slow in heating food.  As an example a cup of water left in for 2 minuets is still cool but set for 5 min. is boiling.  Have power setting to 100% and have tried unplugging the unit to reset it.  Thanks for your help.

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  • David Emmel
    David Emmel May 11, 2010

    How old is the unit? water is a poor example for determing heating times due to ground temperature changes. Also supply voltage can be a culprit, altough rarely. Try testing with a food items known cooking time and compare the 2. Example, frozen pastry 2 min. on high should be done within 2 min +/- 15 sec.

    If item takes much longer to cook then, you may have a weak magnetron tube,(buy a new oven) Note: Use recommended times on the product packages, not my example.

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  • Maytag Master
  • 9,098 Answers

Water is always called for in standard microwave heating tests.

By design, water molecules are what are targeted by the microwave cooking process.

If your line voltage is correct and it is slow to heat, then almost certainly your magnetron is failing.

If it's within the magnetron portion of the warranty but out of the original full warranty, then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

If you or someone you know wants to look into this, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

NOTE: 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.

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

Posted on May 24, 2008

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However, due to the dangers of high-voltage within the unit, I would recommend taking the unit to a repair center.

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