Question about Whirlpool GH7155XHS Microwave Oven

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How to open the control panel to troubleshoot no power failure condition?

My Mom's Whirlpool RM278BXV-4 built-in microwave oven quit working soon after she pushed the start button. Now it has no power at all - no light, and the control panel display is blank. The conventional oven at the bottom has a light when we open the door - so we know power is getting to the unit.
It looks like the problem is a fuse or the control module itself...

The problem I'm having now is that I can't even open the control panel for further troubleshooting. I turned off the breaker at the wall and removed the 2 screws at the top of the panel and now the top can tilt forward a little bit. Then I tried to push it up to unlock it from the tabs at the bottom so I could pull it out, BUT it is really hard. It almost seems that there are other screws securing the panel, but I can't see it.

Could anyone help me and describe how to remove the control panel so I can access the circuit board and/or the fuse(s) to troubleshoot the problem further?

Thank you very much in advance for your help.

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  • Whirlpool Master
  • 8,820 Answers

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

We have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

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

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

Feel free to contact me directly.

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

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

Posted on Aug 02, 2008

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1 Answer

I have a Whirlpool old model # RM278BXV-3 and it has started shutting all the way down when heating things up. Contol panel goes blank and quits heating.


Sounds like the control panel. All the other parts are just brute force parts and either work or they don't. Over heating components on the control board are the probable cause.

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The cooktop lights of my whirlpool microwave have quit working and both bulbs are in good condition. I know how to access the fuses. which fuse needs to bee replaced?


In some cases, it may be a fuse on some Whirlpool models, but your control circuit board may need repair, too.

There should be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, & testing. It will help you find the fuses. See video link below.

We see (and repair) this type of board failure a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid with a one year guarantee.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This can often also affect the exhaust fan, cooling fan, turntable, and/or inside light operation, too.

Details of our service are at our Web site, along with a video showing how to remove a typical over the range control panel assembly in under 5 minutes.

Or you can order a new control circuit board from the Pros here, our favorite supplier.

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

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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.

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1 Answer

Whirlpool Microwave error F3H


F3H Humidity sensor failure 1. Unplug microwave oven or disconnect power.
2. Connect a new sensor to the board (at P5).
3. Plug in microwave oven or reconnect power.
4. If no failure code appears when starting sensor function:
 Unplug microwave oven or disconnect power.
 Replace old sensor.
5. If failure code appears when starting sensor function:
 Unplug microwave oven or disconnect power.
 Replace power supply board.
6. Plug in microwave oven or reconnect power.

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1 Answer

Have an older model (RM278BXV) Whirlpool microwave


what is the problem with it im guessing it prob doesnt heat, if so prob need to get acess inside and check components i would recommend getting a service call as some componoents inside are still live even when unplugged,, it might require a magnetron which would be fairly expensive but if u dont wana replace it than i guess its your only option.. hope this helps

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1 Answer

Kenmore 401.8008700 ran 10 minutes thought I'd set on timer


It could be the fuse. You will also need to check the condition and alignment of the door switches.
Eric

Jul 15, 2009 | Whirlpool GH6177XP 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.

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2 Answers

Microwave ahs power but doesn't heat.


check the magnetron and related circuit and high voltage fuse and high voltage diodes, etc..

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