Microwave model# fgmv174kf after 30sec starts constant buzzing, occasional smell of smoke, and now it won't heat up even a cup of water

Hello -

It is probably safe to use the microwave oven after removing the burned smell.

I found some methods for removing a burned smell from a microwave.

From:
https://blog.bostonappliance.net/5-foolproof-ways-to-get-burnt-popcorn-smell-out-of-the-microwave/

(Quote)
1. Fill a bowl with 1/2 cup water and 1 tablespoon white vinegar.

• Microwave it for 4-5 minutes and leave it with the door shut for 10-15 minutes.
• Steam will loosen smell-causing detritus stuck to the walls. Vinegar absorbs odors, even stubborn ones like burnt popcorn smell.
• After the waiting period, remove the bowl and wipe the inside of the microwave down with a paper towel

2. Not good enough? Okay - soak a sponge with vinegar.Place some baking soda on top and microwave the sponge for 25 seconds.

• Wipe the inside of the microwave with the sponge.
• Don't forget the glass tray and the microwave door.

3. If steps 1-2 don't remove all the grime, soak cotton balls with acetone-free nail polish remover and wipe down the inside of the microwave.

• Even stubborn stains should come out.
• Wipe down the inside with soap, then vinegar water, to remove the polish remover.
• We recommend following through with step 4 to get rid of chemical smells.

4. Banish the remaining smells with the power of citrus.

• Peel two oranges or slice a lemon in half.
• Place the orange peels or lemon slices in a bowl of water (1-2 cups).
• Microwave it for 4 minutes. Watch closely to ensure that the water stays in the bowl and the citrus peels do not burn.
• If possible, leave the bowl in the microwave (with the door closed) for 12 hours.
• Too time-consuming, or just not doable for you? That's okay too. Let the bowl sit in the closed microwave for half an hour then, if the burnt smell persists, continue to step 5.

5. Still bad odors in your microwave? Leave an open box of baking soda on your microwave tray overnight.

• It will neurtalize the odor without adding to the smelly situation in any way.
• You can also place coffee grounds from your morning coffee in a bowl in the microwave all day while you are at work.
• If you don't mind coffee smell, you can microwave 2 tablespoons of coffee grounds in a half cup of water for 2-3 minutes to expedite the process.

(End quote)

Best wishes.

Microwaving cloth is not a good idea. Rather than drying out the moisture (or for whatever reason it was put in the oven), microwaving it will just make the water really, really hot! You could easily burn yourself trying to handle the item. The heat could also damage the fabric itself or even ignite it....which it looks like happened.

The microwave oven should be safe to use but you need to remove the odor.

A couple of ways to try to get rid of the burnt odor:
Fill a microwavable bowl with 1/2 cup water and 1 tablespoon white vinegar.

1. Microwave it for 4-5 minutes and leave it with the door shut for 10-15 minutes.
2. Steam will loosen smell-causing detritus stuck to the walls. ...
3. After the waiting period, remove the bowl and wipe the inside of the microwave down with a paper towel.

A different way is put two tablespoons of baking soda in a microwave safe bowl and add a cup of water on top of that. Then put the bowl in the microwave for three minutes. The baking soda will kill the funky smells and the water will start to steam clean the spots and stains.
Good luck with your troubleshooting.
Helpful?

Microwaves contain high-voltage parts that can be deadly, even when unplugged, unless handled correctly. Unless you are a qualified expert, don't attempt to get into its inner workings.

First, use this water method to double-check if there is actually an issue with your microwave not heating:

1. Fill a glass measuring cup with water to the 1-cup mark.
2. Set the microwave to heat on full power for 1 minute.
3. Repeat the process with fresh water a handful of times.
4. If the water is not consistently warm, your problem is confirmed.

If your microwave is failing to heat correctly, you may be on a previously programmed setting. Press the STOP/CANCEL button and start the heating process again, but use a higher power setting. This may correct the problem.

If the microwave senses an open door, it will not run. Check to see if a defective or loose door-safety interlock switch is to blame. If tightening it doesn't work, a replacement may be necessary.

Did you know? Neglecting to hit the STOP/CANCEL button on the microwave before you open the door to remove your food damages the safety switch over time.

Microwaves installed above the range may be affected by steam from cooking. Condensation collecting on the circuitry can interrupt heating. Allow the circuitry to dry out by avoiding stovetop cooking for a few days. If you're still having the same problem, it could be a loose connection in the circuitry or a faulty door safety switch.

There may be an issue with the circuit board and its connections, and that work is best left to a qualified professional.

A buzzing or humming microwave that emits a faint burning smell could signal a damaged magnetron, high-voltage capacitor or diode. Replacement magnetrons are expensive, so if a service professional determines that's the problem, you may be better off buying a new microwave. Capacitor and diode parts cost much less, but remember, you'll be paying for the expertise to have them installed correctly and safely. It may still make more sense to buy a new microwave, especially if it's a simple countertop model.

For more troubleshooting steps and simple solutions, read Microwave not heating. I hope this helps!

Microwaves contain high-voltage parts that can be deadly, even when unplugged, unless handled correctly. Unless you are a qualified expert, don't attempt to get into its inner workings.
Put 1 cup of water in the microwave and set it to heat on full power for 1 minute. Repeat the process with fresh water several times. If the water is not consistently warm, you've confirmed there's a problem.

If your microwave is failing to heat correctly, you may be on a previously programmed setting. Press the STOP/CANCEL button and start the heating process again, but use a higher power setting. This may correct the problem.

Otherwise, there may be an issue with the circuit board and its connections. If a qualified professional determines that the circuit board is defective, the most practical fix may be to buy a new microwave.

Microwaves installed above the range may be affected by steam from cooking. Condensation collecting on the circuitry can interrupt heating. Allow the circuitry to dry out by avoiding stovetop cooking for a few days. If you're still having the same problem, it could be a loose connection in the circuitry or a faulty door safety switch.

A buzzing or humming microwave that emits a faint burning smell could signal a damaged magnetron, high-voltage capacitor or diode. Replacement magnetrons are expensive, so if a service professional determines that's the problem, you may be better off buying a new microwave. Capacitor and diode parts cost much less, but remember, you'll be paying for the expertise to have them installed correctly and safely. It may still make more sense to buy a new microwave, especially if it's a simple countertop model.

For more troubleshooting steps and simple solutions, read Microwave not heating. I hope this helps!

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