My sharp microwave drawer, kb6524, keeps shutting down as if a fuse is blown. We have checked the circuit breaker, it is not blown. If we unplug and replug it in, the microwave works. However, it then shuts down as if unplugged and we need to unplug it again. Any idea? Thank you.

Take the body cover off and locate the regular glass fuse near the control panel wiring and make sure the fuse is good. A blown circuit breaker is the first clue that the fuse could have also blown.

I have rescued tons of microwaves for the lack of a 50 cent fuse.

Rick,
Good possibility that you have a blown fuse. Follow the directions provided below to find the fuse.

Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Be very careful about touching electrical connections because there can still be some live current stored in the capacitor. Look for where the power cord goes into the back of the unit and follow the black wire from the cord to where it ends. It should stop an either a circuit board or a fuse holder. Make sure that you replace the fuse with the same amperage fuse as what you take out. You will find the amp rating stamped on one of the silver collars on each end of the fuse. Good luck!

Steve,
You probably have a blown fuse.

Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Look for where the power cord goes into the back of the unit and follow the black wire from the cord to where it ends. It should stop an either a circuit board or a fuse holder. Make sure that you replace the fuse with the same amperage fuse as what you take out. You will find the amp rating stamped on one of the silver collars on each end of the fuse. Good luck!

Are there any display lights?
If not check your house circuit breaker. Check main
Fuse inside microwave. If fuse is blown check damper diode and HV capcitor, magnatron.

I've got the same model and the same problem. Inside the microwave the Noise Isolation transformer shows black carbon from arcing on both sides of the PCB, but only no one pin.
It looks like a short to me, but I'm not sure what to replace. It appears this might be a common problem.

nope sure isnt, if it doesnt turn on you may have just blown either the load in fuse or the high voltage fuse down the bottom, remove the cover should be a couple screws round the outside and check fuses if you know how (MAKE SURE ITS UNPLUGGED FROM THE POWER FIRST) (NEVER START THE MICROWAVE WITHOUT THE METAL COVER ON AS THIS ACTS AS A RADIATION SHIELD)

from online Microwave Repair Manual: Totally dead oven (no lights, no clock, no display, no fan, no heat...)First, check power to the outlet using a lamp or radio you know works. The fuse or circuit breaker at your service panel may have blown/tripped due to an overload or fault in the microwave oven or some other appliance. You may just have too many appliances plugged into this circuit - microwave ovens are high current appliances and should be on a dedicated circuit if possible. If you attempt to run a heating appliance like a toaster or fryer at the same time, you *will* blow the fuse or trip the circuit breaker. A refrigerator should never be plugged into the same circuit for this reason as well - you really don't want it to be without power because of your popcorn!

If you find the fuse blown or circuit breaker tripped, unplug everything from the circuit to which the microwave is connected (keep in mind that other outlets may be fed from the same circuit). Replace the fuse or reset the circuit breaker. If the same thing happens again, you have a problem with the outlet or other wiring on the same branch circuit. If plugging in the microwave causes the fuse to blow or circuit breaker to trip immediately, there is a short circuit in the power cord or elsewhere.

The microwave oven may be powered from a GFCI outlet or downstream of one and the GFCI may have tripped. (Removing a broken oven lamp has been known to happen.) The GFCI outlet may not be in an obvious location but first check the countertop outlets. The tripped GFCI could be in the garage or almost anywhere else! Pushing the RESET button may be all that's needed.

Next, try to set the clock. With some ovens the screen will be totally blank following a power outage - there may be nothing wrong with it. Furthermore, some ovens will not allow you perform any cooking related actions until the clock is set to a valid time.

Assuming these are not your problems, a fuse has probably blown although a dead controller is a possibility.

While you can do some repairs on your microwave, what you don't know can kill you... even on an unplugged microwave, so make sure you understand the dangers and how to reduce them before you try anything inside a microwave. If you want to do more yourself, go to the link at the top of this post.

If a fuse inside had blown, that would definitely reduce the current flow rather than trip the breaker.
I have replaced several breakers over the years; they no longer last forever.
Try your Amana on a different circuit, not in the kitchen; if that other circuit likes the oven, the breaker is bad. If the alternate circuit breaker also trips, then you have not a blown fuse in the Amana but rather a shorted component inside and repairing the oven will likely cost about the same as replacing it.

• Make sure that the microwave is plugged into a grounded outlet. It must be a 3-prong outlet.
  
• Make sure the clock is set.
• Check to see if a programming sequence was entered. Sometimes improper programming or a program sequence such as delay start can cause the touch panel to be non-responsive. Unplug microwave or turn off house circuit breaker for 30 seconds. Plug back in, or reset circuit breaker, and try reprogramming unit.
  
• Check the house circuit breaker or fuse box. If the microwave is DEAD and there is no display and nothing works- the problem could be a blown fuse or tripped breaker.

The problem may be an electrical one. Microwave ovens require a lot of power. Often, they use most of the power available to the circuit they are plugged in to. If there is not enough power in the circuit to feed the microwave and whatever else is plugged into that same circuit the fuse will blow or the circuit breaker will kick off.

Go to your electcical box, and check the breakers or the fuses. If one of the breakers has kicked, reset it by pushing it all the way off and then back on. If the fuse is blown, unscrew it and screw in a new one of the same amperage.

good luck. please rate my answer. thanks