Question about Whirlpool GH5184XPQ Microwave Oven

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I was microwaving something, the microwave began making a very strange humming/buzzing sound. I turned it off, restarted it and it once again made the noise. This time when I shut it off (by opening the door) everything went black, no power to the key pad, no time shown etc. There is power to the outlet that the device is plugged into and I checked the main circuit breaker and it was fine (I even reset it to make sure).

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I suspect there are two things wrong with the oven.

First, the humming noise was probably due to a bad magnetron tube. The magnetron is the microwave source, and when they fail they often cause the oven to make that odd sound. It's because of the load the bad tube puts on the power supply. There are a couple of other parts that can cause similar problems when they fail, but the magnetron is the most common.

The second problem is that now the oven has a blown fuse because you opened the door while the oven was running. There is a switch inside the oven, operated by one of the door latches, which is wired so the fuse will blow if you try to run the oven with the door open. I suspect it did its job in this case.

The fuse can be replaced, as can the magnetron. However, the magnetron is the most expensive part of the oven and it may be more economical to replace the oven than to repair it. Microwave oven repairs, especially a magnetron replacement, should be left to a professional because of safety concerns. Between the part cost and labor, it may only cost a little more to buy a new oven. I don't know how old your oven is, but check your owner's manual for warranty information. Maybe you'll be lucky and find the part cost is covered, even though you'll probably have to pay the labor. If the oven is more than two or three years old, though, it's unlikely there's any warranty left.

If you want to keep this oven, let a qualified servicer check it and give you an estimate for the repair. Or look around for an after-Christmas sale and treat yourself to a new oven.

Posted on Dec 29, 2010

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Buzzing noise


follow this steps and fix it. God bless you

  1. MagnetronIf your microwave is emanating high pitched or growling noises during operation, the magnetron could be going bad. Normally a nearly silent part, the magnetron uses high voltage and induces the frequency required to cook food. Although normally not a safety hazard to operate, this is a sign that the magnetron is failing and will need to be replaced as soon as possible.
  2. Exhaust fan motorIf your microwave is making a very loud humming noise during operation, it could possibly be the exhaust fan motor. If defective the part will need to be replaced to silence the appliance once more.
  3. Stirrer motorAnother leading cause of a noisy microwave is an expired stirrer motor. With use this part becomes worn and makes a loud grinding noise, which is usually a leading indicator that the part needs to be replaced. The stirrer is a metal blade that is slowly turned by the motor. This action disperses the microwave energy in a random pattern, which heats the food evenly. If the stirrer motor is determined to be nearing expiration, it should be replaced to halt the grinding noise.
  4. Turntable motorA very common cause for a noisy microwave is a worn out t
urntable motor. This is a relatively easy repair and will put an end to the noise once replaced.

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hELLO THERE
when a microwave quits heating but every thing else is ok normally
investigate these 4 areas

Investigate these three areas if your microwave won't heat but you hear a loud buzzing or humming noise:
microwave_diode.jpg Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

picturena.gif High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

microwave_magnetron.jpg Magnetron

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So we can help you, please post a NEW question, and please include your full model number from the tag in or on the unit, as well as the answers to these questions:

When you try to microwave are the inside light, internal cooling fan and turntable all working?

Is there any unusual noise or is it louder or quieter than normal?

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are working.

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

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Okay, first we need to separate the situations. You were boiling water on the stove and had the range hood fan running to **** up the steam. Then you put something in the microwave to heat and you heard a pop and then zip-o.

The water on the stove has nothing to do with the situation, the fan you turn on is not part of the microwave, so it has nothing to do with the microwave.

The pop you heard and then the humming suggests the magnetron failed. You said you found a blow fuse and replaced it and still nothing, right? The magnetron is the most likely culprit...I would think it is safe to say that the magnetron shorted and drew enough current to blow the fuse.

Replace the magnetron and if that doesn't work, let me know here. Good Luck!

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If a rattling cabinet is the problem, either try to reposition something, or just ignore it!

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