Question about Sharp R-1405 / R-140 Microwave Oven

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2000 HR Endeavor "over the range microwave oven"

Hi,
I have found out that if I press ******* the upper right part of the door while at the same time pressing up on the bottom of the door, then everything seems to work OK. Does this mean that I need a new door switch? If so, How do I get at the switch to replace it? And where do I get a new switch? Thanks, Glenn

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  • Sharp Master
  • 8,820 Answers

It may be a loose or broken door switch mount or possibly a bad switch.

I have attached (via e-mail) our safety, disassembly & door switch files.

Essentially you make sure it's *unplugged*, then remove the outer cover.

Then you can see inside behind the control panel where the door latches go into the chassis.

There are plastic mounts inside the microwave which hold the door switches and onto which the door hooks latch when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Other times, it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

Just opening and closing the door a few times while observing closely will show you where the problem is.

I stock these switches and I can send you one for $6.00, or you can get one from a local appliance parts store, or some hardware stores and home centers like Home Depot or Lowe's.

Once you've looked all this over, please let me know if I can help further.

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

Posted on May 30, 2008

  • William Miller
    William Miller Jun 03, 2008

    Pardon if this is redundant, but your test shows that you probably have a broken or misaligned door switch holder.



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It sounds like you may have a bad keypad or (hopefully) a simple door switch failure.

When you press Start, if it does not beep, then either the door open switch is bad (not very likely) or its mount is bad, or your membrane keypad is failing.

If it beeps when press Start, and your fan and inside light come on and it counts down, but the turntable doesn't turn and it doesn't cook, then you have a bad secondary interlock (lower door switch with white and gray wires) or its mount is broken or loose.

You can try gently pushing up and down on the door while trying to hit Start. That will sometimes make it try to work.

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If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

We have the service manual for this model and I can e-mail to you.

If you'd like us to install the keypad, we can do it for $39.95 plus parts.

Please feel free to contact me directly if you need more help.

Please contact me directly and I'll also send you installation info on several Sharp models. That should give you enough info in case you decide to remove it.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

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