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LG refrigerator "Er IF" error code is the "Icemaker Fan Error" message.T his error code indicates a problem with the fan
that controls the unit's ice production. If this problem occurs because
of ice buildup, unplugging the unit for 3 to 4 hours and allowing it to
thaw may fix the issue. Call customer service if that doesn't work.
The error code
means one or both of these parts are bad.
Motor Control Unit (8540135)
Microcomputer Machine Control Unit (8540788)
It would be a good idea to order both, as both components have been
problematic for error code F28
If you find either the MCU or the CCU(Microcomputer Machine Control
Unit) fixed it.
You can download the online repair manual in the below link
U3 means the tub filled to quickly or the water failed to drain. Do you have very high water pressure? are you using the wrong detergent? eg you can't use tablets (powerballs) etc in the unit. Try putting half a cup of white vinegar in the tub to kill any foam. Check there isn't anything stuck under the motor rotor inside the tub and the there's no signs of damage. Put the drain hose in a bucket and see if the water drains ok when the unit starts? If everything seems ok I'd suspect the main motor controller module but it may be worth getting an appliance tech to inspect unit first as it's hard without seeing this unit. feel free to ask any questions. Cheers
i put mine in the shop it is the laser and it cost $219.00 for the part because it comes in an assemlby piece it depends on how much they charge for labor. I choose not to fix due to high cost of it all it is in a bag besid emy computer