Question about Samsung SMH7178STD Microwave Oven

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Partial keypad failure

Some keys work some don't

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Quite a common problem this. The keypad needs to be replaced. Very seldom but possible that there is an actual pcb fault, but most likely cause is the keypad itself

Posted on May 06, 2014

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How do i my keypad to work


If the keypad is not working, chances are that the keypad had got faulty, some cases it can be failure of the membrane carbon tracks. other wise it can be moisture build up or even a connector fault of the key pad. You can try and remove the pad and PCB and use a hair dryer to warm the pads and the pcb. if you notice any insects or coakroaches inside , then it can also be due to secretion damage on the pcb which means that the touch pad must be replaced.

Aug 09, 2014 | Hamilton Beach Microwave Ovens

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Troubleshooting KitchenAid oven, range and microwave error codes


Here list of Kitchen Aid range and oven codes.


4 Digit Failure Codes

F1 - E0 EEPROM communication error
F1 - E1 EEPROM checksum error
F1 - E2 UL A/D error
F1 - E4 Model ID error
F1 - E5 Calibration shifted
F1 - E6 Latch signal mismatch error
F1 - E9 Stack overflow
F1 - E3 Wiring harness cavity size does not match stored value
F2 - E0 Shorted touch pad
F2 - E1 Keypad cable connection error
F2 - E5 Cancel key drive line open
F2 - E6 Cancel key drive line open
F3 - E0 Oven temperature sensor (RTD) opened (upper oven on double oven models)
F3 - E1 Oven temperature sensor (RTD) shorted (upper oven on double oven models)
F3 - E2 Oven temperature is too high (Cook mode)
F3 - E3 Oven temperature is too high (Clean mode)
F3 - E4 Oven temperature sensor (RTD) opened (lower oven on double oven models)
F3 - E5 Oven temperature sensor (RTD) shorted (lower oven on double oven models)
F3 - E6 Drawer sensor open
F3 - E7 Warming drawer sensor shorted
F4 - E1 Meat probe malfunction - shorted
F5 - E0 Door Switch
F5 - E1 Self clean latch will not lock
F5 - E2 Latch during CLEAN error
F5 - E5 Self clean temperature not reached within 45 minutes.
F5 - E6 Door is open, but latch is locked
F5 - E7 Self clean latch will not unlock
F6 - E0 Return line not connected
F7 - E1 Common switch wire defective

Two digit codes:

F0 ERC Board failure
F1 ERC Board failure
F2 Oven temperature is too high
F3 Oven temperature sensor open
F4 Oven temperature sensor shorted
F5 ERC Board failure
F7 Function key stuck on ERC
F8 ERC Board failure
F9 Oven door lock failure

Microwave and Microwave combo error codes:

F1 - E3 or F1 - E4 Electronic control malfunction

F2 - E0 or F2 - E1 Keypad connection error

F2 - E3 Keypad held down too long, or keypad is shorted.

If you get an error code, try first resetting the code:
1. Disconnect power for about two minutes.
2. Connect back power.
3. If code re-appears, test and eventually replace faulty part.

Regards.

on Mar 27, 2010 | KitchenAid KHMS155LSS 1000 Watts Microwave...

1 Answer

GE Microwave keypad partially working


You have a failing membrane keypad.

On some models you can order just the membrane keypad. It's more work, but it's cheaper.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

On other models, you have to order the control panel frame which comes with a new keypad already on it.

A YouTube video showing how to remove a typical over the range control panel assembly in under 5 minutes, is here.

40716d4.jpg

Some connectors have a lock.

positivelock.jpg
You can order GE parts from Sears hereimage-4235112-10659157 and the site should have helpful exploded views.

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

Nov 30, 2012 | Microwave Ovens

1 Answer

Keypad don't light up


see this causes and fix it. God bless you
Lights come on, but can not program unit, Touchpad dead If you have a stuck key or non-responsive key, most of the time you will have to replace the keypad for this microwave oven repair. If your keypad is connected to your control board by a flat ribbon wire, try disconnecting it and clean the silver contacts with an ordinary pencil eraser. After cleaning, plug it back in and try it. If it doesn't fix it, replace the keypad unit. Some units actually have keypad tests to confirm your diagnosis of a bad key.
If your keypad and control is the same unit, replace that unit. Another note, unlike stove/oven keypads and controls, most microwaves do not have error codes or tests to distinguish whether it is truely the keypad or control. Most of the time, it is the keypad that needs replacing, but a small percentage of the time it can be the control. Check the tech sheet if they can point you to the right part.


9_25_2012_3_39_28_pm.gif

Sep 25, 2012 | Maytag MMV4205 Microwave Oven

1 Answer

Some keys don't work


Yes! the whole keypad control board will need to be replaced.

May 17, 2012 | KitchenAid KHMS155L Microwave Oven

1 Answer

Some of the numbers on the key pad are not working.


You have a failed membrane keypad. It's not uncommon for it to be intermittent or partially operable, too.

On some models, you have to peel off the old keypad and stick on a new one.
If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved. It's here.

On some models, the membrane keypad is not available as a separate part, so you would have to order the control panel frame assembly which comes with a new keypad.

In this case, you simply move your circuit board into the new frame. That is a simple do-it-yourself job.

You can find helpful exploded view diagrams and order parts by entering your full model number (with any suffix) from the tag on the oven
here.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

If you have to replace the frame, you unplug the keypad (as per the photo below) and move the circuit board into your frame.


34374fd.jpg

Some connectors on the relays may have a lock:

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

Jul 07, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Only a few buttons on my key panel work, example the start/ clear button does not work, a few numbers do work. I think its from condensation. How can I dry this out? Can I use a hair dryer?


Yes you can use a hair dryer but the power should be off so that you don't short it out any more than it already is. Most likely the keypad has been ruined and will need replaced., Once these go bad there is no fix except to replace the keypad.

Apr 23, 2011 | LG LMVM2055 Convection/Microwave Oven

2 Answers

I have a whirlpool microwave oven over the range. Model GH 5184xps-4 when I press start, it comes on for one second then it shows a code -F7- and stops


TOUCH PANEL & MICROCOMPUTER BOARD TEST FOR WHIRLPOOL....

The microwave oven may be provided with a self diagnostic routine that can be operated

through the touch pad keyboard. To enter the self-diagnostic routine:

1.While pressing the CANCEL keypad:
a) Open the oven door.
b) Unplug the microwave oven for 2-seconds and plug it back in.
c) Release the CANCEL keypad and close the oven door. You will see the following display.

CHART
NOTE: The humidity sensor test results will appear on the display after 8-seconds.If the tests are successful, "OK " will be displayed. If one or more of the tests fail, "ERR " will be displayed.. 2.When a keypad is pressed, a number according to the test chart will be displayed. When no keypad is pressed, a blank "O" (square) is displayed...

POWER FAILURE & FAILURE CODES
Power Failure: After a power failure, the WELCOME screen will be displayed.

F2 Keyboard Failure: Refer to the Tech Sheet and conduct a touch panel continuity test.

F3 Humidity Sensor Failure: Refer to the Tech Sheet and test the sensor.

F6 Microwave Relay Failure: Check the microwave relay.

F7 Microcomputer Board Failure: Change the microcomputer board.


Hope helps.

Apr 12, 2011 | Whirlpool Microwave Ovens

1 Answer

Reads F2 doesnt work


Hi,
F2 indicates a failure in the touch key pad. The part number for the keypad is 4393916 for white, 4393917 for black and 4393918 for almond color.

The part runs about $77.00. It can be replaced by removing the upper grille, then removing the one screw on top of the touch pad.

Jul 16, 2010 | Whirlpool MH7140XF Microwave Oven

2 Answers

Keypad on microwave wont work


TOUCH PANEL & MICROCOMPUTER BOARD TEST FOR WHIRLPOOL....

The microwave oven may be provided with a self diagnostic routine that can be operated

through the touch pad keyboard. To enter the self-diagnostic routine:

1.While pressing the CANCEL keypad:

a) Open the oven door.

b) Unplug the microwave oven for 2-seconds and plug it back in.

c) Release the CANCEL keypad and close the oven door. You will see the following display.

CHART

NOTE: The humidity sensor test results will appear on the display after 8-seconds.If the tests are successful, "OK " will be displayed. If one or more of the tests fail, "ERR " will be displayed.. 2.When a keypad is pressed, a number according to the test chart will be displayed. When no keypad is pressed, a blank "—" is displayed...

 

POWER FAILURE &FAILURE CODES

Power Failure: After a power failure, the WELCOME screen will be displayed.

F2 —Keyboard Failure: Refer to the Tech Sheet and conduct a touch panel continuity test.

F3H —Humidity Sensor Failure: Refer to the Tech Sheet and test the sensor.

F6 —Microwave Relay Failure: Check the microwave relay.

F7 —Microcomputer Board Failure: Change the microcomputer board.

Oct 18, 2007 | Microwave Ovens

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