I purchased this LG two years ago. I heard some squeaking from behind. It became nosier and now squeals. I can see the fan from the side. The fan isn't facing toward to exterior, but toward to coils. I vaccumed the dust, used a blowdryer to blow the dust. I sprayed a lubricant on the rod going to the fan. I even took a bendable straw and sprayed lubricant to the middle of the fan which is impossible to see. It helped just a tiny bit and now its just non stop. It's like Chinese Water Torture in our house. I don't even see a way to take the fan off to clean it. Please help!
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Re: LG LCS 26905 Fan won't stop squealing
These fans have DC brushless motors, the stator is one piece with a disc in the middle. When these fans start to wear out the shaft begins to wobble, this distorts the the rotation of the shaft. This makes the stator disc touch the communtator.Generating the squealing that you are experiencing. But this fan might not be the problem. The freezer fan is behind the rear panel of the freezer draw. It is very hard to detect this problem because the fan spins but not fast enough to circulete the chilled air thru the freezer and refrigerator.
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I had a book written for you and remembered something basic I learned in electronics school and had to delete it all. Sigh. So with a smile I start all over and hopefully make this short.
Are you certain there is a belt?
Let's assume there is. A belt means a motor is spinning the belt which is spinning another pulley or "wheel". You could be correct that the belt needs to be changed. They stretch over time causing slippage. That is one way you hear "squeak". The other way which I hate and am dealing with on my car right now is the pulley or pulley's themselves.
If you don't have a belt then your motor is directly running your fan. That means the "squeal" is coming from the pulley's bearings. Most fans I have seen come pre greased from the manufacturer and are not made with a hole to squirt a little inside. They are designed with an expected lifespan. That's another story though.
The bearings get too dry and they begin to, well, drag. That drag is the squeal you hear. Your warning sign that pretty soon they are going to stop dragging and just dry up and stop rolling completely. When that happens you may turn your fan on and hear a hum but the fan doesn't work. To simplify this for everyone, the ball bearings inside no longer roll so the fan no longer spins.
You may have a belt and two pulley's (or more like in a car) and have a good belt but a bad pulley. Most people throw away the product thinking it is no longer useable when all that is needed is to loosen a single screw in the middle of the pulley and replacing it with it's exact make giving the device another jillion years of use.
Now for the conclusion. If you find that the pulley is the problem, go ahead and change that belt that has never been changed to save yourself from the squeal you will hear from that new strong pulley making that loose belt squeal.
One last thing. Check by seeing if it wobbles when turned on or feels loose and slightly wobbly when turned by hand, with it turned off of course. Good luck.
Make sure its simply not the A/C tensioner thats gone bad. You might just have to replace that one. There's absolutely no reason a belt should be the culprit unless it is tearing or ripped so you can look for wear and tear on the belts. Most likely a pulley is out of alignment or the pulley bearing is just starting to squeal when it gets wet. But it can still squeal if its dry outside.
Take the belt off and spin it with your hand, if it squeaks, its bad. I had to replace one years ago, they just go bad. Make sure the A/C compressor isn't whats squealing too, and the other top pulleys too. Sometimes you can be fooled on where the squeal is really coming from. Spin everything that can be spun, by hand.
is this a new radio? if so then the voltage change on the vco/pll will cause a squeak. kindda like a cobra 19dx does. also like the old golden eagle squeal .. all due to the voltage being unstable.. now is it that prob or do you have talkback and its loud/bad grounds causing a squeal. that could be the case too. if you have talk back let me know there's a cure for that. contact us..we can put the talkback just lil outtaphase to stop 99% of the squeals in cobra/uniden chassis radios.
If the model is equipped with a fan, and the noise occurs even when not oscillating it must be a fan/blower motor. If it is a squeak. A squeal could be an electical component going bad which is always bad. I would definitely take some bottom drawer tools , ie. screwdrivers and WD-40 and oil that squeaking motor. Being a fan it goes through alot of air pollutants. That tends to build up on the shaft and can work its way into the bearing seal. Good luck.