We have an LG sidebyside, it is a few years old. In the last week I have noticed a very minor occational musical tone that it emits. I have checked and things look like everything is good, the water filter does need to be changed, do you have any idea what this tone is for?
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Re: LG Frig musical tone-why
The musical tone is generally a door alarm letting you know the door is not closed all the way. I'm not sure about the LG sxs but their french door model has a service pointer about the lights not going out due to a bad door switch. 1st of all be sure your doors are closing properly then the next time you hear the alarm without opening the doors use a putty knife or butter knife and squeeze the seal back from the unit and see if the lights are still on in the refrig. you could have a misaligned door or bad switch..
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Inside your LG there is a component call backlight inverter that is was cause of the loose of tone. Normally the part is located on the left side of the screen. You can call LG and they can give you the part number average cost is about $45 to $75.00 very easy to install.
I have this same refrigerator, also purchased in 2006. Same exact problem. Fridge freezes, starting actually in the water line, you will notice water on door does not work, then top two shelves start to freeze. Lasts for a few days, then prob does not happen again for 6 months almost to the day. I've had this problem for almost 3 years!!! My service tech said to buy another, glitch in this system he can't figure out. Replaced damper x2, control board, and thermostat x2. Not sure what else to do. I hate the thought of more food lost to spoilage!
is it running? if so, are all motors running, is it not cold anywhere, is it cold somewhere, is it not running, that could be a few different things as well. My advice, pay a house call from a local repair company and find out for sure. many many times its a minor repair, indeed worth fixing since older refrigerators will last 3-4 times, yes 3-4 times as long as a newer model. some more than that.
You will need to remove the bottom freezer crisper and check the defrost drain , to see if it is iced over . If so , then use a hairdryer to melt the ice ( hot water also helps ) . When you see the drain , ( could be obvious obstruction from plastic ) , use a small hose inserted into the hole , to blow thru , to remove any unseen debris blockage . You may have to remove the rear inside freezer panel to access this drain , depending on your model number .
So make sure the drainhole is open. When it happened to mine this was the problem.
there may be a software update for the powertrain control module for mis-fire monitor. check with your local dealer. but if thats not the case,these engines are known at least in my experience of having the heads crack between the valves and cause mild mis-fires. try compression testing all the cylinders and performing a leakdown test on them as well.
If there is a leak in the system you will notice considerable change in temperature of the frig. In most cases, if this is a leak, you will see a builup of oil coming out of the leak as refrigerant has oil in it. You may be able to hear it or smell the refrigerant. What is commonplace in alot of systems is this noise. When the compressor is running, it is biulder pressure inside of the refrigerant lines. There is a low pressure side and a high pressure side while it is running. When the compressor shuts down after achieving the set temp, The system will start to equal the pressure on both high and low sides of the system. Actually the compressor will not start again untill these pressures are equalized or at least close. The noise you are hearing is most likely the refrigerant in the system while the system is equalizing the pressure on both high and low sides. I have noticed that some systems are more noticable than others. Unless you notice considerable change in temp of your frig, it is probably the equalizing of the system. I am not sure what the corrosion on the line would be without actualy seeing it myself but I have never come across a frig that had a leak and didn`t lose all or enough of the refrigerant without it being noticable inside the frig itself. For it to be a leak the temp in the frig should be or very soon will be noticably warmer.