Question about Whirlpool GH4155XP Microwave Oven

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Small fire in GH4155XP Microwave Oven >

I find the info useful that the fuse or thermostat might be blown. I want to open up the microwave and take a look. Where can I find step by step instruction on how to open up this microwave or any diagrams that will show me how to proceed. Please help. Thanks.

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  • sksave save Jul 22, 2007

    I got quote from sears, they say that control panel and thermostat needs to be replaced. Are these parts easy to replace? Can I order them and replace myself?
    Please advise.
    This is what he wrote:
    - 1 upgrade kit ( I don't know what this is for)
    - 1 Panl-cntrl
    - 1 Thrmst-Fix

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1 Answer

William Miller
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  • Whirlpool Master
  • 9,098 Answers

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk Inside the oven, in the control panel frame behind the door open button is a "mini-manual" - a tech sheet that helps in troubleshooting & locating components. I would suspect the themrostat / thermal cutout mounted on on above the magnetron.

Posted on Jun 26, 2007

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Posted on Jan 02, 2017

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Sharp r957 micro wave keeps blowing small ceramic internal fuse /replaced magnetron/fuse then blow again/replaced capacitor/fuse again/blown again/ could problem be power transformer?
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I had a small fire in the microwave (model GH4155XP) but it now is "dead". Appears to have no power or anything when plugged in. Yet the cord and all else seems absolutely fine. Breaker is fine...
Open cover and check if all wires are OK.

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Whirlpool gh4155xp gold does not work when plugged in to outlet. nothing is working. want to know if there is a fuse i can replace to get it to work
I'd test the outlet with a toaster or hair dryer first.

There will be a 20A fuse and two or three cavity thermostats.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

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

Accessing the thermostats for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download Whirlpool owner's manuals and installation instructions here.

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

Dec 05, 2010 | Whirlpool GH4155XP Microwave Oven

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No power or functions of any kind.
Check the external fuse / circuit breaker first.

IF that is OK, then it's possible an internal fuse has blown. These can be replaced but it should only be attempted if you are confident enough to be able to discharge and ground the main capacitor before working on the device.

Mar 23, 2010 | Whirlpool GH4155XP Microwave Oven

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F2 is appearing on microwave and its not working
F2 on a Whirlpool microwave means you have a shorted membrane keypad.

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.

Please note that FixYa is not currently notifying us Experts when Clarification Requests are answered.

To allow us to help you effectively (at no charge), please post a NEW problem to FixYa, and please include your brand name and the full model number from the tag in or on the unit, your symptoms, "F2 fault code".

Dec 13, 2009 | Whirlpool GH4155XP Microwave Oven

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Microvave does not heat the food
The Litz Coil or Magnetron Tube has failed. You can look for blown fuses when you remove it but there is usually another reason it blew and will most likely continue to do so if replaced. They are not worth repairing so it may be time to get a new one.

Jul 20, 2009 | Whirlpool GH4155XP Microwave Oven

1 Answer

Our microwave went dead. It's only three years old. My husband put some chicken wings in, closed the door, and everything went black. We plugged in a nightlight in the power source and it worked. Any ideas...
a few possible causes,
1, the high voltage fuse,
2, the high voltage capacitor
3, the slow blow fuse ( normally found on a small pcb inside unit)

other than that, check the door switches and maybe the x former.
good luck.

Jul 04, 2009 | Whirlpool GH4155XP Microwave Oven

1 Answer

Whirlpool oven
Hi, there are three issues that will cause a no heat situation in a microwave. these issue are a failed Magnetron, busted cut-off fuse and, failed diode.

I recommend checking all these area that are located inside the microwave for faults.

The most common issue will be a failed Magnetron.

The diode and, fuse will be located on the noise filter assembly.

Jun 22, 2009 | Whirlpool GH4155XP Microwave Oven

1 Answer

Please help me
Q - My microwave went dead when I opened the door ( same problem as closed the door ).
A - This often is a stuck or faulty door switch and it has blown the interior microwave fuse.
Q - My microwave is completely dead.
A - House fuse has blown or interior fuse inside the microwave has blown ( usually a part inside the microwave makes this fuse blow ) Sometimes a bad fuse holder inside the microwave cannot hold the fuse tight enough and the fuse will blow as well. 
Q - My microwave blows the fuse inside itself as soon as I push the start button.
A - Usually a shorted high voltage capacitor...see components section.
Q - I burnt something in my microwave and now it is dead...help!
A - The fuse inside the microwave may have blown, but more commonly the flame/oven thermostat has sensed the over cooked food and the flame/oven/cavity thermostat has opened up - Info on that 
Q - My microwave seems to shut off every once in a while, what might be wrong?
A - Make sure you hear the fan is still operating in your microwave. Next is to make sure the air intake grill on your microwave is not plugged up with air borne dust and dirt.
Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.

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Small fire n microwave
check mains supply at control circuit, and check all the high voltage circuit diode and condencers and magnetron.

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