Question about Samsung SMH7178STD Microwave Oven

1 Answer

My Samsung microwave MW430WA often refuses to respond to all control buttons. Sometimes the screen shows "ON", sometimes "OFF" and on these occasions will often restore the time by presssing the Pause/Cancel, whereupon the time is displayed on the screen and normal response to all buttons. More often I can do nothing at all to use this oven.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,515 Answers

Hi,

Before i jump to the conclusion that you need to check Control Board, i have to think for Defective Electronic Timer.

Symptoms of Defective Electronic Timer are :-

SYMPTOM:
Any type of irregularities or inconsistencies in the display, such as: 1) missing, dimming, flashing, flickering (a slight fluorescent flicker is normal), or overly bright numbers or segments; or 2) the occasional appearance of illogical or mysterious Chinese-like characters (this may also be the result of improper or inadequate grounding).
SYMPTOM:
Any type of programming problems, for example: 1) Pressing one number or function and the panel responding with another; or, some pads program and others do not. These symptoms may be caused by either the touch panel or the control panel or both. 2) Limited or no programming functions. An exception to this symptom is the fact that some models made by Sharp will not program unless the stop switch is in the closed position. Therefore the oven door must be closed and the stop switch properly adjusted before the control panel will accept programming. 3) The control panel "locks up"; maybe one or more numbers will be displayed, but the panel will not reset or program.
SYMPTOM:
The control panel "kicking out" of a cook cycle prematurely, then possibly "locking up." The oven may have to be unplugged then plugged back in before the panel will accept programming. Possible causes: poor or improper grounding; or, excessive amounts of stray RF leakage, either from the latch side of the door, or from the magnetron within the component compartment. If removing the outer case alleviates the symptom, suspect leakage from the RF gasket or the internal structure of the magnetron.
SYMPTOM:
The control panel counts down too quickly or too slowly. Inaccurate timing may also be the result of an oven (of the type that can be converted from 50 to 60 cycles and vice-versa) being set for the wrong voltage or frequency for the area in which it is being used.
SYMPTOM:
The control panel will not start, or fails to count down when started; or, the panel counts down but neglects to activate the cook relay, triac, stirrer or blower motor, or other panel-controlled component. This may also be the result of a misadjusted or defective interlock switch, faulty wiring or related connections, or an open thermal protector or fuse.
NOTE: The triac or triac module (part of many control units) may be checked in several ways.

SYMPTOM:
Either all indicator lights are lit, or no display at all, as though the panel is "dead." (In the case of no display or a "dead" panel, ensure that the low-voltage control transformer is supplying the appropriate voltages. Or if the low-voltage transformer is part of the control board, check for the appropriate input (primary) voltage to the panel before judging it to be defective.)
SYMPTOM:
Either a continuous beep or buzz; or none at all.
SYMPTOM:
The timer buttons remain depressed, thus holding the oven in a continuous cook mode. Litton and some other models use individual pushbuttons that are soldered on to the printed circuit board. These buttons may stick in the depressed position due to inadequate clearance through the cutouts in the timer faceplate. In these cases, the circuit board position may be adjusted to equally center the buttons in their openings, ensuring that the cutouts and buttons are free of grease and residue. In more extreme cases, the size of the hole can be increased by filing the sides of the obstructing cutouts with a small, fine file (the circuit board must be removed first). Then clean any metal filings from the casting and re-assemble the timer, making sure that the timer board is centered so that the buttons operate freely.
Check and let me know.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Oct 06, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Microwave won't start when pressing the start botton


call Chas&son,s appliance repair at 579-379-0993 and they will come out the same day no less okay

Feb 13, 2013 | GE JE2160 Microwave Oven

1 Answer

Microwave won't start


call Chas&son,s appliance repair at 579-379-0993 and they will come out the same day no less okay

Feb 13, 2013 | Microwave Ovens

1 Answer

Buttons on microwave


testing every step and fix it. God bless you see the diagram attached

Microwave Buttons Don't Work
Touchpad and Control Panel


If the microwave buttons don't work the touchpad and control panel assembly are probably defective.
Touchpad


If the microwave buttons don't work the touchpad might be at fault. Generally speaking, if the dishwasher display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.
User Control and Display Board


If the microwave buttons don't work the user control and display board are most likely defective and will need to be replaced. If some of the buttons work and some don't, it is more likely a touch pad problem and the touch pad will need to be replaced.
Main Control Board


If the microwave buttons don't work the main control board is most likely defective and will need to be replaced. If some of the buttons work the touch pad is likely the problem. If none of the buttons work the problem may be in the main control board.1_24_2013_5_23_47_pm.gif1_24_2013_5_24_54_pm.jpg

Jan 24, 2013 | Goldstar MV-1501 Microwave Oven

1 Answer

Samsung microwave MW1430WA often refuses to respond to any control buttons. Sometimes it shows ''ON'', sometimes ''OFF'' and on these occasions will often restore Time by pressing ''Pause/Cancel'',...


If and when an oven is coming on or doing anything by itself, this is very dangerous and can result in a fire.

So until it is repaired, please leave it unplugged or leave the door open when it's not in use, and please do not leave it running unattended.

You have a failing membrane keypad.

On some models, you have to peel off the old one and replace it.

On some models, you remove your controller and move your circuit board into a new frame with a keypad already installed.

FixYa is not currently notifying us when Clarification Requests are answered, so please contact me directly with your full model number from the tag on / in the unit and color so we can help you with free do-it-yourself tips and/or an estimate.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Oct 05, 2009 | Samsung SMH7178STD Microwave Oven

1 Answer

Samsung microwave MW1430WA often refuses to respond to any control buttons. Sometimes it shows ''ON'', sometimes ''OFF'' and on these occasions will often restore Time by pressing ''Pause/Cancel'',...


If and when an oven is coming on or doing anything by itself, this is very dangerous and can result in a fire.

So until it is repaired, please leave it unplugged or leave the door open when it's not in use, and please do not leave it running unattended.

You have a failing membrane keypad.

On some models, you have to peel off the old one and replace it.

On some models, you remove your controller and move your circuit board into a new frame with a keypad already installed.

FixYa is not currently notifying us when Clarification Requests are answered, so please contact me directly with your full model number from the tag on / in the unit and color so we can help you with free do-it-yourself tips and/or an estimate.

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


William E. Miller
prototech@usa.net
http://www.microwavedisplay.com



Oct 05, 2009 | Samsung Microwave Ovens

2 Answers

My microwave panel is not working.


Sometimes if the door switches are faulty then the touch panel may not respond. There are usually 3 switches, and I'd recommend if one if faulty replacing all of them as a set. Otherwise it may be a Control Panel fault.

Mar 18, 2009 | LG LMVM2055 Convection/Microwave Oven

1 Answer

My microwave start button doesn't push in to start my microwave


The keypad is a thin plastic membrane type that is glued to the plastic control panel frame.

It's most likely that the keypad is worn out or possibly you have a flaky door switch.

We have full details, critical safety, disassembly, and troubleshooting info (as well as door switch testing info) at our site. You'll find a link to our site in our listing here on FixYa: http://tinyurl.com/yzjozk

You can usually order Samsung parts (either the keypad / membrane switch or control panel with keypad) from http://www.samsungparts.com but that model number is not showing up, so you may have to call or e-mail them through their site.

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

Dec 27, 2007 | Microwave Ovens

1 Answer

Panasonic nn-k354 microwave


Is it possible that some spray cleaner got into the controls?

I always recommend that users spray cleaner on a soft cloth then wipe the control panel.

I always recommend non-ammonia cleaners since they can crack and damage plastic.

Otherwise, the spray can get into the controls and lock it up or make it act odd.

If it does not dry out over time, it may need to be manually dried or blown out.

The keypad may be damaged or worn out, or control unit may be damaged.

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

Nov 05, 2007 | Microwave Ovens

3 Answers

MY MICROWAVE WILL NOT DO ANYTHING


I couldn't find those exact trouble codes, but a common problem is when the controller gets damp, either from steam rising from the cooktop or someone spraying cleaner directly on the keypad. Cleaners should always be sprayed on a soft cloth, then wipe the keypad with the cloth. Also, GE / Samsung codes of F1, F2 and F3 may be the same since Samsung makes GE microwaves. Those would mean trouble with the temperature sensor, keypad, or control panel. Assuming your control panel is clean and dry, it may be time to call for service.

Apr 04, 2007 | Samsung MW1080STA Microwave Oven

Not finding what you are looking for?
Microwave Ovens Logo

Related Topics:

39 people viewed this question

Ask a Question

Usually answered in minutes!

Top Samsung Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9085 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Henry  Thomas
Henry Thomas

Level 3 Expert

1074 Answers

Are you a Samsung Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...