SHARP MICOWAVE,PUSH RELEASE BUTTON AND SHORTS ELECTRIC OUT?

The transformer that makes hi voltage for the Magnetron tube is causing the fuse to blow. This may be a bad Magnetron tube or a shorted winding in the transformer. Price for the repair may be too close to the price for a new oven, so check with a repair center before deciding to replace it.

Robert, you have a short somewhere in the electrical system and that is why it keeps blowing the fuse. Many times, I have found that one of the micro-switches connected to the door opening are the culprit to the short. You would need access to a multi-meter that can measure continuity to be able to check them. Some microwaves are more difficult than others to access those micro-switches and you will need to be able to pull the wires off of the switches to get an accurate reading. If you decide to try this yourself, either take a picture of the wiring before you remove any wires or at least write down a good description of the wiring. You might use some masking tape and put a small piece around each wire and number them in sequence and write that down so that you make sure to re-wire the switches properly. Each of the switches are going to be a normally open or normally closed switch and one of them may have a bad internal connection and you may have no reading at all or have the same reading no matter which way the button is pushed. You will have to push the button on the switch to activate the switch to get your reading. A normally open switch will have no reading until you push the button. A normally closed switch should always have a reading until you push the button. If you have no reading or a constant reading or if the button will not push, that switch is going to be your problem. Replace that switch and put everything back together and that should take care of your problem. Hope this helps!

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

The problem I had experienced with the Door not opening easily will be resolved by removing the micowave oven top cover with a tamper proof torx head, replacing the door switch and reinstalling the top cover.

REPLACE THE PUSH BUTTON.SOMETIMES IT GETS WORN OR THE PLASTIC "***" HAS BROKEN OFF;COMMON PROBLEM.HOPE THIS HELPS .PLEASE RATE MY RESPONSE :)

Sounds like a portion of the release knob is worn or broken, or a metal piece behind it is bent.

It may be a shorted diode in the HV power supply for the magnetron. Open the case to get to the part. Unplug the machine before opening anything. This is normally a high voltage area when running.

After unplugging the microwave, I took the side/top panel off by removing the screws on the back*. Inside I found the piece that had broken off the part that pushes the door release. I then glued this piece back on using "Extreme Power" medium advanced performance instant adhesive. I bought this glue in a hobby shop in Richardson, Texas. I waited 12 hours for the glue to set. The door has been opening for the last two days.
*With the cover off, you can open the door by pushing the door release.

Magnetron
http://www.repairclinic.com/Sharp-Microwave-Model-R1831-ID-589705-Parts

One or more door switches is bad, or the switch mount is loose or broken. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk