My Samsung RS263022 fridge makes humming noises that comes and goes. One day it will hum, the next it won't. The time the noise varies. Listening to the humming, I can tell it is coming from the back. Where does this noise come from and how can I fix it?

No a noise filter is a different kettle of fish. That stops electrical interference noise from affecting your television, radios and electrical devices.

The most likely source of the hum is the start capacitor on the motor, or the motor itself.

https://www.google.com/search?q=samsung+dishwasher+start+capacitor

This has a different idea

Humming or Grinding If your Samsung dishwasher makes noise when starting that sounds like a low hum, it's part of normal function. The motor makes this sound as it operates throughout the wash cycle. However, a dishwasher making loud humming noise or grinding sounds could mean that debris is caught in the drain pump.

Samsung Dishwasher Making Noise? Follow These Tips

This says the drain pump, but the drain pump only runs to empty out so it wouldn't do it all the time.

https://kitchenbuds.com/dishwasher-guides/samsung-dishwasher-making-grinding-noise/

Lots of other ideas and videos

https://www.google.com/search?q=samsung+dishwasher+humming

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Open the door and hold the switch in to see exacly where the noise is coming from.

no problem with that it is normal..your ref working properly it is just the motor you hear

the noise is coming from the wheel section, it's called air splash, humming varies with speed, main causes are wheel alignment due to loose ball joint, check if your tire erodes on one side, next check your disc brake for clogged air cooled vain and disc wearing

what kind of noise? if rattling noise and noiser when you accelerate, either in idle position or while moving, then you need to overhaul. if high pitch sound and noiser when you accelerate, then check you bearing in timing belt mechanism

Put wide tape on different areas of the windshield edge as a test to see if the noise changes.Then you may know where the noise originates and can correct the noise.
Just by chance,it is a wind noise? and not a front wheel bearing going bad?which is common on these vehicles and can create a humming at different speeds.Next time when the hum shows up turn the steering wheel slightly left and right at road speed and if you can change the hum,it's 99% a wheel bearing.

sonds like thre is a problem with the defrost because you should not have that much ice on the coils. go ahead and do a manual derfost and make sure that the drain lne is clear and not frozen up. If it is oyu can use a turkey baster with hot water to thaw it until the watr flows easily out the tube in the unit. also how are you gaskets looking? are they starting to leak air into the freezer and the refrigerator/ at 18 years old those are a few of the things to look at. Hopte that htis solves yur problems and if not don't rate this and I can still come back and post answer or solutions for yu. After the final them rate if you would be so kind. Thanks for using FixYa.

if you have ice buildup then the fridge may be low on freon.
or there is dust clogging around the pump or fan is not running.
remove the bottom or back and look around the compressor.
see that the fan is running.

Sounds like the freezer fan is rubbing some wires or possible some foam insulation around the fan. I would look into the freezer compartment fan and go from there. The fan Will Shut off when you open the doors. Let me know how you make out and if you need anymore help.

Thanks,
Bill