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How to Troubleshoot a Sharp Microwave Oven

Sharp Microwave OvenMost microwave manufacturers highly recommend contacting a certified technician before doing any repairs on your microwave yourself, but there are a few things you can troubleshoot before you make a call to a repair company.

  1. Check your owner’s manual to ensure that the power cord is grounded appropriately. It should be plugged into a 3-pronged electrical outlet. Also, make sure to check fuses and circuit breaker.
  2. Pour a cup of water into a glass measuring cup and place in microwave. The water is used for two reasons: 1) you should never run a microwave while it is empty; foods and liquids help absorb the microwave energy, and 2) it will help you feel temperature differences later on.
  3. Close the microwave door and microwave the water for 1 minute. Take note if the light comes on or not. Put your hand over the back ventilation opening and note if you feel air coming out. For R-21HT, R-21HV and R-21JV models, not whether or not the “ON” indicator comes on.
  4. After the 1 minute passes, pull the glass measuring cup out of the microwave and test the temperature of the water (careful, don’t burn yourself). Note if the water is hot or not.

If the light isn’t coming on, you feel no air coming out of the ventilation opening, and/or the water isn’t warm when you test it, you may want to contact Sharp authorized repair vendor. If your microwave is still under warranty, make sure to let the vendor know.

If what you’re seeing, however, is the timing rapidly counting down, the demonstration mode may be on. To reset/cancel this, simply unplug the microwave, wait 30 seconds, and then plug it back in.

About Kasy Allen

Kasy Allen is the owner and lead marketing strategist of Annapurna Digital, a digital marketing agency. In addition to working with Tundra Restaurant Supply with their online marketing strategies, Kasy has helped many online brands find their online voice and an online marketing strategy that brings in the right users and increased revenue. When not in the office, Kasy can be found exploring the great outdoors of the Colorado Rocky Mountains.

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  1. Thanks for the tips! My microwave doesn’t seem to heat up my food as well as it used to, so I could use some help to fix it. I liked your tip to make sure that it’s plugged in securely enough. These tips for testing it on my own seem like a great way to find out if making sure that it’s plugged in well enough will do the trick. I’ll try using a cup of hot water to see if there are any changes in temperature instead of leaving it empty while it’s on.

  2. thank you for your tips. my sharp microwave oven is almost a new one. the touch button is not working.
    could you please help me to start the microwave oven.



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