Microwave door . Door will not seal well enought to run microwave. If I lift up and push on top of door while running will still run. Only 3 years old if that.

if opening and closing the door fails to clear the fault , then your door switch's have a fault in them , this is not too uncommon on microwaves , as most of them have three separate door switches ,(its a safety thing ) as the last thing in the world you'd want to happen is running it with the door open . make sure the door seals properly and there's nothing down in the cracks (even the hinge side) that keeping it from closing properly , I once had a pealing factory label do this , so it doesn't take much to trip the door switch

THE FAN AND MICROWAVE TUBE RUN OFF THE ELECTRONIC TIMER. OPENING THE DOOR SHOULD SHUT IT ALL DOWN AND WHEN YOU CLOSE THE DOOR AGAIN YOU SHOULD NEED TO PRESS THE START BUTTON AGAIN. IF NOT, ITS SOUNDS LIKE AN ELECTRONIC RELAY IS LOCKED CLOSED ON THE TIMER BOARD.

Disconnect microwave from power socket, remove cabinet outer cover,and lift the top or bottom door latch at micro-switch bracket with a screwdriver, the door can then be opened.

There are usually 3 door interlock switches on most microwave ovens, which are held in place by plastic pieces which are screwed in place from the front of the microwave oven (although you may have to remove or tilt out the top of the control console to see them). Make sure these plastic support pieces are positioned against the front of the microwave oven, and make sure the screws are tight.

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I typically find it is not door hinge issues but door switch issues, especially with sharp. You may heve a little movenent in the door hinge and that is allowing the door hook to move up and down on the plunger for a door switch that is probably a bit melted due to bad connections. If you check the door switches and look for any browning around the terminals where the wires push onto the switch you will probably find an overheated connectoion. Replace the bad switch and run better wires and better termninals to the new switch and it will probably be fine.

I do not know your unit specifically but a lot of them you have to start by, slowly, from the inside of the door, lifting up on the choke that runs along the outer inside edge of the door. It looks like a plastic trim part about 3/4 of an inch wide. You slowly work around the whole door unit you get it popped out. a butter knife or steak knife works pretty well . I just use a small flat head screw driver The screws for the handle are behind that choke seal. Usually 2 Phillips head screws. The choke part just snaps in place and has no screws to put it back, just push back in place and you will hear it snap as you go. Be careful the plastic tabs are easy to break off

You got it! One of the door switches is not activating. Take a look at the door itself first. There should be two tabs that stick out. These tabs will engage in the holes near the control panel. If the door does not have a broken tab then the problem is behind the control panel on one of the switches. There are 3 switches back there.

Unplug the power cord, it is usually in the cabinet above the microwave oven. Then take the grille off the top, the screws for the grille are on the top of the unit facing down. With the grill off you will see the one screw on top of the control panel, remove that screw and lift up and out on the control panel this will give you access to view the switches and test them with an ohmmeter.

I'm assuming you mis-typed and meant the oven begins running when you SHUT the door and stops when you OPEN the door. Please tell me this is what you meant! If the microwave oven runs with the door open, UPLUG IT IMMEDIATELY AND DO NOT USE IT!!!

If the oven begins running without pushing the start button then the controller is bad or the Start button is worn out and making contact without pushing it. (Most likely it is your controller.) Generally, it is not worth the cost to replace the controller on a 10 year old microwave. Probably time for a new one.

But if you want, you can call Whirlpool and see what they suggest at 800-253-1301.

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Hi,
The problem is the door switch is defective. I'm on my third new switch in 3 years. The part number is 5304440026.

In most cases this is due to a broken door opening lever or loose or broken door latch / hook parts. They can only be accessed and examined if the cover is removed from the microwave. In many over the range models, you can access the door parts by removing the control panel assembly. Sometimes you may be able to get it open by pushing up gently on the bottom of the door while pushing the button, in case you need to empty it.