20 Most Recent Sharp R-520LK Microwave Oven Questions & Answers

Unplug the unit and then, after waiting a minute, try plugging it back in. It needs a reset.

there are fuses in your microwave but they dont normaly blow unless there is another fault,
the fuses are not the normal house size fuses and are quick and slow blow types plus a high voltage fuse,

Get some paper towels and clean the insides out with vinegar, do this once every two hours over a period of 8 hours. Then leave a box a baking soda inside the microwave with the door open outside overnight.

That should do the trick!

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

Microwave Oven Basic Troubleshooting Tips

heatman101

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

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

Quite often this is due to grease or food particles stuck somewhere in the cavity of the oven or stuck on or behind the waveguide cover.

It may also be in the area of the turntable support, coupler, or motor.

The waveguide cover (also called a spatter shield) is usually about the size of a playing card and often held in place by a plastic rivet.

It can be fragile, and the metal edges of the oven behind it can be sharp, so be careful!

The cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

The area will first have to be sanded smooth and cleaned and dried thoroughly.

If the cavity metal of the oven is cracked or split, you can use a small amount of steel-based epoxy such as JB-WELD to patch the crack or hole.

Once that dries thoroughly, you can sand it very smooth.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

If your waveguide cover is burned, it will need to be replaced.

It provides critical protection for the magnetron.

We have the service manual for this model and have uploaded it for you here.

You can order Sharp parts from Encompass here or you can call them toll-free at 866-779-5835.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

The microwave oven has got a couple of safety components to protect it and the people from harm. One is an interlock switch to prevent it starting if door is not properly closed. The other is a thermal fuse which blows if the oven becomes too hot.

In your case it is likely the thermal fuse is blown. This prevents the oven turntable, fan and the magnetron (the main microwave generator) from starting.

You can find the details in the service manual

http://207.234.249.73/mwd/r520lk_r520lw_sm.pdf

But I would not recommend you to fix it yourself if you are not familiar with electrical gadgets, especially the micorwave because it is unsafe and has very high voltage.

Please post a comment to confirm you have understood my solution to your problem.

microwaves are cheep, unless you have repair skill`s in this field your best to have it serviced or get a new one

You didn't mention your brand or model number, but since you posted this under Sharp, maybe it's a Sharp?

If so, in most cases, this will usually be a bad bottom door switch or door switch mount.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock 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.

Sometimes 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.



If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Chances are that the magnetron has stopped working. Unless it is under the guarantee or is a very expensive micro it really wont be worth fixing.

Quite often this is due to grease or food particles stuck somewhere in the cavity of the oven or stuck on or behind the waveguide cover.

The metal behind it should be cleaned with a mild, non-ammonia cleaner.

If the metal is chipped or charred, the area will first have to be sanded smooth and cleaned and dried thoroughly.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

If your waveguide cover is burned or damaged, it will need to be replaced. It provides important protection for the magnetron.

You can order Sharp parts from Encompass here or you can call them toll-free at 866-779-5835.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.