Question about Sharp Microwave Ovens

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I can't defrost in the microwave Sharp S-250a. I choose defrost but then I can't choose any other option to set the time or start! thanks

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Posted on Oct 18, 2013


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 9098 Answers

SOURCE: GE Microwave TimeCook defaults to Defrost Auto

It sounds like your keypad (membrane switch) is failing.

If you or someone you know decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa:

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

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting. You can use it to test for a bad keypad.

If you'd rather have us fix it for you, we do that for $39.95 plus parts and you can visit us via our link her eon Fixya

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

Posted on Mar 18, 2008

  • 1 Answer

SOURCE: Sharp Microwave/convection oven

We had the same problem, and the service technician quoted over $300 to fix it. My wife found this thread online (click on link below) and after following the advice here ours is now fixed for a total cost of under $40, and that included a new soldering iron (see below)!

The problem is either the damper motor or the damper switch. You can order both from Tritronics and ours shipped un less than a week. It is not possible to tell which it is without disassembling the microwave, so I ordered both. In our case it was the switch (one of the electrical contacts was black like it had burned out).

Read all the advice about discharging the capacitor; I would recommend downloading and printing out the service manual (especially page 18 which is an exploded parts diagram which helps you identify what is what (click on link below)

Page 14 is also useful because it gives you the part numbers to order from Tritronics. The two items you may need are 1-11 Damper switch and 1-22 Damper motor.

The space is rather tight, and you need to be very careful you don't cut your hand on the sharp (no pun intended) metal. It definitely helps to remove the long mounting bolts that runs through the space. Be very careful when disconnecting the electrical connections: the little metals tabs they use on the ends of the wires break very easily - hence the soldering iron. The most difficult piece is undoing the screw on the right hand side that secures the motor; it's just cramped and you need a very small/short phillips screwdriver to get to it. I would advise removing the switch first (it's secured by a couple of little metal tabs) because then the cam which drives the damper door will be able to drop free when you remove the motor. Finally, when installing the new motor, make sure that the tab on the cam wheel is correctly inserted into the little slot on the bottom of the damper door.

As I said above, read all the advice on the other thread and the general advice on working around microwaves on the web site. It's all good stuff. Good luck!

Posted on Dec 23, 2008

  • 1557 Answers

SOURCE: sharp microwave grill and oven working ok, microwave option not

the magnatron is burnt out they are very expensive to replqace thus i would suggest bying a new microwave

Posted on Apr 21, 2010

Testimonial: "thanks for the quick reply, ya even i think so that the problem, but i had no idea how expensive a magnatron is and where to buy it. do you know?"

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