Question about Sharp R-630D Microwave Oven

1 Answer

Display and heating problems

1)-The small alphanumerical dots that make up the LCD display are starting to drop out (not seen) making interpretating the display difficult when running or inactive.

2)-Another recently surfaced problem is that the the unit will cut-out heating while the carousel still turns and countdown timer continues until the end of the requested cooking time.

Regarding #1, the display problem, I tried unplugging the unit from the power source, waiting at least a minute, then re-connecting the power cord. This action does nothing to help the display, although...once in a while...the display will suddenly work as it did when first purchased. This state usually lasts all but a day at the most before reverting back to the described problem state as mentioned in #1 above. I even tried to use my fingers to lightly run across the membrane type keypad to feel anything 'odd' where the contacts are located underneath. I felt nothing unusual.

Regarding #2, the power cutting out, I tried connecting/re-connecting the unit from the power source with no success. The unit does heat the contents and the carousel does turn, but the power intermittedly stops premature during a heating session. This is a noggin scratcher for me.

Hope there is something I can do to resolve this sate of my unit. Thank you in advance for your answer(s)!

EZ of NJ

Posted by eaglez on

  • Anonymous Mar 05, 2008

    I have had the same problem with mine for a couple years now evidently the displays must have a weakness in manufacturing



1 Answer

William Miller

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Problem #2 is a bad door switch or door switch mount.

Problem #1 is a trouble with the control unit / display.

The avergae do-it-yourselfer can replace a door switch if he follows the proper safety and repair advice.

We repair control units on a regular basis for customers nationwide with our guaranteed $39.95 service.

We have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, linked here on Fixya:

When you get to our site, do a Ctrl-F search for R630.

We also have the entrie service manual for these on our site.

Posted on Nov 05, 2007

  • William Miller
    William Miller Nov 05, 2007

    Hey Guest,

    F3 (depending on brand and model) is usually a defective thermistor or temperature sensor, vbut on GE's it's a bad keypad.

    I'd put my money on the peypad in this case.

    If you have a GE, you can usually find helpful exploded view diagrams and order parts by entering your full model number here:



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