Question about Samsung SMH7178STD Microwave Oven

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Microwave hummes when door is shut but stops when open. Wheb running it still hummes.

It seams to overcook also.

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: AFTER FOOD TAKEN OUT WHEN HEATING CYCLE DONE, SHUT DOOR AND THE MICROWAVE TURNS ON, LIGHT COMES ON AND FAN STARTS. WILL NOT STOP UNLESS OPEN AND SHUT DOOR AGAIN.

this problem comes with switches . bring it to the shop. fix around$50

Posted on Mar 12, 2012

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1 Answer

Kenmore microwave model 401.85053010 just stopped working because door will not shut and lock. Does the main board have a safety interlock tie-in for the door?


Most Microwaves have anywhere between 3 and 5 switches to monitor if the door is open or closed. They have to act in proper sequence too. It is a safery feature so you can not run it with the door open.

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Check the door switches if one is bad it may think the door is being opened and stop the unit from running. If it is from a bad connection it will get worse as it gets hotter while running.

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I have a 10 year old MH7130XE Whirlpool microwave oven. The oven and key pad both work, and the oven heats just fine. The problem is the oven begins running as soon as you open the door...without pushing...


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.

If this was helpful, please select YES to the first two RATINGS questions. Good Luck!

Oct 18, 2009 | Whirlpool MH7130XE Microwave Oven

1 Answer

Microwave won't shut off


The door switches are what tells the microwave that the door is opened or closed. If they play up they could be causing your microwave to act strangely.

Mar 25, 2009 | GE Microwave Ovens

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GE microwave won't turn off


Just checked the GE website. Had the same problem with my 5 year old microwave. GE website says to close and open the door quickly three times. First time I did this it didn't work. Second time I closed the door with some significant force and reopened it more quickly. Worked. Unplugged the microwave, plugged it back in, still fine.

Mar 21, 2009 | Microwave Ovens

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My microwave is not working and the repair in scheduled for April 3rd. This is not acceptable. Please helop me to find how I get in touch with the department that handles scheduling. My panasonic...


This is a very serious problem safety first! A microwave oven is safe
As long as the door is closed but is deadly if allowed to operate with it open.
There are safety switches built into the oven that disengage the high powered
Microwaves when the door is opened. They are not operating properly or
The oven would shut off when the door was opened. Microwaves can cause
Severe burns, cataracts, pacemaker malfunctions and cancer. Also microwaves
Can damage the electronics that control the keypad , you microwave oven
Is not just malfunctioning it is a severe health risk and sould not be used.
Unplug it and it must be repaired or replaced if it is still under wannty
And you pay very little are nothing let them fix it otherwise replace it.

Feb 25, 2009 | Panasonic NN-S541 Microwave Oven

1 Answer

Microwave runs when the door is open.. stops when you shut it.


This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

This can be caused by slamming the door or by habitually opening the door while it's cooking without hitting the Stop pad first.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

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

Feb 11, 2008 | Microwave Ovens

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