20 Most Recent LG French Door Cabinet Depth Refrigerator 21 Cu. Ft. - LRFC21755 Questions & Answers

FF is your freezer fan. You may need to defrost the unit.

NOTE: This
is a multi-solution answer since I don't have all the tech from your question to pinpoint your problem
But the solution is in here generically, if you read and study the solutions very,very carefully.
Check Temp inside freezer. It has to be down to about 10 or 15 degrees
This can cause slow ice making if its too high even tho its freezing everything else at 25 degrees
See if water is in icemaker.
Pour water in Ice Maker and wait to see if it ejects.
If it ejects thenyou need to replace water valve in rear bottom of fridge(Its the part that
attaches to water line out of wall)
If it doesn't eject then it is a faulty Ice Maker.
If its leaking or no water at icemaker or door either one, then the valve at the rear bottom of ref needs replacing
First I would check the fan in the freezer. Listen to see if it is running
It moves air to the ref from the freezer
Then check to see if freezer control is turned WARMER, which makes the Ref. colder
Also if it is getting drinking water to the door but not to the icemaker (or vice versa) Then you need to replace
the water valve at the bottom rear of the fridge. It is a double valve and one side is not working
Also this might be a common Defrost problem, Ice
is not being melted by the defrost system.The fan can't blow through the coils into the fridge.
Take out back panel of freezer to check for ice buildup. The coils should be clean.
There are three components to a defrost system- a heater,heater thermostat, and a timer unless you have a defrost electronic card.
Its best handled by a Technician but you could possibly do it by taking your model number to the nearest appliance parts store and asking for the parts. They are mostly located in freezer ,behind back panel on freezer coils.except the card which is usually located in ref The parts store will have info
Also check fan undernearh Ref in the rear
Clean condenser coils underneath
.I'm including my article on Refrigerator Repair for your help and convenience.;
Please click or copy and paste into browser for Article
http://www.fixya.com/support/r5816737-fix_refrigerator_psychologically
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Leo Ponder
imufo2
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You are seriously frozen up. Defrost the unit completely. Then, be aware that 'window shopping', leaving uncovered liquids in the box and poor door sealing (too heavy a load on the door ... too much on shelves) can cause condensation. Defrost with hot air or leave unplugged and open for about 2 days. You'll see alot of water come out.

If you are sure you are getting power to the machine then you need to start by checking the OLP. This is the overloa protection device on the compressor. If that checks ok then • Check if the power switch is set to OFF.
• Check if the fuse of the power switch is shorted.• Replace the fuse. See page 13 If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Turns out a CF ER is a Compressor Fan problem.
Had a look and the fan was not turning, although it spins freely. Apparently it's a 3 phase 12v fan. I was able to get a resistance measurement across it but didn't know what to expect.
This also explains why it seemed a bit quieter and why the water is a bit warmer sometimes. The valve for the water dispenser is right beside the fan and it's getting pretty hot in there at the moment.

Try pulling the cover off in the back of the fridge and see if the fan is still operating when you push the light sensor switch in but hold it down for at least 10-20seconds to see if it starts.

Fridge freezing up- and no fan or air circulation: AT TIMES The fan usually stops working due to ice obstruction when the defrost terminator has gone out and u get ice build up? u can check the terminator with a multi meter for continuity but do not check at room temperature. stick the terminator in cup of ice water for 20 minutes then check it for continuity, should be closed when cold and open at room temperature. May also need to check the defrost timer, The defrost timer is usually found behind the front grill "toe kick" of the refrigerator. Or in the fridge compartment near middle top section. u can get by and test manually by placing a small screw driver into the tiny slot or hole underneath the timer and turn slowly clockwise till u hear 1 click. this will engage ur defrost cycle in about 15 minutes u should be able to come back and feel the heat in freezer as it melts the ice providing ur terminator is not bad? Another way to test it is with a multi meter. Remove timer it from fridge and you will see 4 prongs numbered 2,1,4,3 in that order. Place ur meter prong on prong 1 & 3 (if your fridge has a capacitor wired in series with the windings, then u check for micro fares rather than OHMS) If u cannot confirm this test, still try the next. Take ur meter prong and connect to prong 1 & 4, it should read resistance or ohms ( closed) now remove prongs and place on prong 1 & 2, this should now read infinity or open (no ohms) now take a small screwdriver place it in the tiny hole or slot under the timer. Turn it clockwise slowly till u hear 1 click. Now ur 1& 2 should read closed ( showing ohms or resistance) now place meter prongs on 1 & 4 and you it should now show open ( or no resistance - no ohms) this is how u know ur timer is good, Remember when testing for ohms ADJUST meter to use a high ohms rating in the thousands as the resistance is very high in OHMS. And adjusting to low ohms rating may give a false reading or not show the proper resistance.. Another item to check with a meter is the heating element itself. Located under the evaporator coils. It should show continuity or resistance OHMS WHEN TESTED AT BOTH ENDS OF THE PRONGS . Lastly check the cold control thermostat with a meter for both OHMS and volts ( VOLTS is a live test with fridge plugged in so be careful) It must show 110 volts. An open or thermostat that reads infinity will not allow the proper cooling and defrosting cycles to operate and may in fact stop anything from happening as if there is no power to the unit? ALSO CHECK THE AIR FLOW VENT SYSTEM and THERMISTORS At times it can get stuck to far closed or open. Some units feature a digital electric adjusting vent system while others are manually set. Check for any ice build up or other obstruction in the vent damper, see if u can manually open or close it. Some times when u have the settings set to the highest it closes off one area while allowing to much cold air flow to the other area! THERMISTORS in the freezer and fridge section for continuity OHMS and for amount of OHMS current being put out. In most models around 1300 ( give or take 150 ohms) ohms is required God is so good: so this is why I give free advice so please thank him not me.

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You just pull it out 12" so the door will open fully.

Happened to me, too. I hadn’t placed the top hinge covers back on after removing the doors to move the fridge. The sensors that tell the fridge the doors are closed are in the hinge covers.

Error code list is given on LG Official website LG Refrigerator - Error Code List ' LG USA Support Error code P5 is not listed in error code list. Please mention exact error code.