I had an LG lrbn22514st and the digital tempeture touch control doesnt respond...im not having cooling or freezing problems but if i want to lower the temp doesnt work for each side (fridge and freezer) it only works for a few hours only if i unpluged the fridge; any sugestions?????
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is it warm or hot to touch? no sticking defrost timer? if not then check the cold control tempeture thermostat, the thermistors, and the door seals, lastly may have a coolant problem, do any of the back copper tubes to the compressor feel cold to the touch
If there is no dust build up on and in the condenser (heat exchanger) fins and the fan runs you may have a bad thermostat (temp control) or be low on refrigerant. But since the condenser is only warm to the touch and since there is no ice I tend to think it's low on refrigerant or expansion valve faulty.
You will need to remove the grill. Unplug the unit, Then on the control board you will see 4 wire with a black connector. Unplug that and plug it in 4 or 5 times. Make sure you dont bend the pins. Then plug the connector back in and plug unit back in. You should have better response on the display. They have a special coating and the pins needs to be cleaned this way.
Those control boards are sort of flakey and any kind of power surge, etc. can really goof them up. If you check under the very bottom of the fridge there should be a technical sheet taped up to the underside in a plastic bag. Take that out and read it to see if there is a test reset you can do before replacing the board.
Unplugging and replugging worked great! (We left it unplugged for about one minute. The motor started up almost instantly but we still had no numbers on display. I discovered that after replugging, you need to touch one of the up or down arrows for the display to reappear.
What a lifesaver this was!
Thanks so much.