We have a LG model lwhd1009r. We cleaned out the unit and the coils are still freezing up and not cooling. We turn the the fan on and it thaws right away, but as soon as you turn on the compressor it freezes

It sounds like your freezing up at the coil, which in turn, blocks airflow across coil and only a small amount of air comes out of the vents. This also explains the cold air coming from fan on the outside unit, since the system cannot absorb the heat from the inside of the house through the coil. Your air outside is usually blowing out warm to hot air because thats the heat it rejects out of your system. I would turn the thermostat to "OFF" and turn just the fan setting to "ON" instead of Auto, this thaws the system out faster. Give it time to fully thaw, make sure filters are clean, and check airflow. If airflow is back to normal, your problem is more than likely the charge of refrigerant. If you have to call a technician out, make sure the unit is not frozen at all before they get there, they would not be able to do anything with the system froze. Hope this helps and good luck!

major causes of evap.freezing dirty coil,evap fan motor or capacitor low on freon.moisture in system. first turn off cooling run fan to completely thaw unit. if possible clean coils and blower wheel. any unit running efficiently the evap coil will be at freezing or below. the key is to have enough airflow across the coil to remove the heat and humidity.its very easy to introduce air and moisture into the system. i have seen alot of techs. over the years make the same mistakes over and over again. when hooking up guages they dont purge the lines back; worst case is only to evacuate freon pull a vacume and recharge

After the unit is totally thawed and dried, turn the unit Off if you haven't already and unplug it. Remove the filter and clean it. If it's really dirty wash it with warm water and dish washing liquid, thoroughly rinse it and allow it to completely dry, before reinstalling. DO NOT operate the unit without the filter in place.

Because the air temperature in a basement is colder at floor level, than at shoulder level, this caused the coils to freeze. Dehumidifiers do not work well at temperatures at or below 60 degrees F. That is, unless, it's a Low Temperature model, designed especially for basement applications. Obviously, yours isn't a Low Temp model.

To overcome this, place the unit up on a sturdy table, counter top, etc, that can handle the weight of the unit, as well as a full bucket of water. The higher off the floor the better. This way, the ambient operational temperature will be higher and the coils will have less of chance to freeze again.

I would suggest that continue to monitor the unit and if you notice that it's doing more than a little frosting on the coils, turn the unit OFF immediately. A little frosting is normal and the deforst mode should kick in and thaw the coils. When this happens, the compressor should automatically shut OFF, but the fan will continue to run. Once it's defrosted, the compressor will start again, if necessary.

I hope this helped you to troubleshoot and solve the problem. Please let me know.

Typical temp split should be 15 to 20 degrees. A 75 degree return air temp should be in the 50s. Be sure coils are clean , if in that range the machine can do no more. If it is not, you likely have a refrigerant issue.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

if the fan isnt running or you dont get enough return air (on the furnace) the coil will freeze up or if you have it set too low it will freeze up overnight, make sure your filters are clean, and that you dont have any return vents (air sucking in) covered with rugs and whatnot. If you have animals, the coil (on top of the furnace) could be clogged with hair, even though you change your filters it still gets clogged with hair and must be cleaned. if your coil was froze up you need to make sure it is completely thawed out, run the fan in the on setting with the a/c off until you dont see or hear any more water then turn it on again. and finially make sure when the furnace goes off (thermostat clicks and is satisfied) the outdoor condenser goes off as well the contactor could have been stuck in the on position. if you cant fix it call someone who can when your coil freezez up it can cause slugging in your compressor (liquid entering the compressor) which will destroy it !!!!!!!!!!!

either going off on low charge which would cause it to ice up, which means you need refrigerant. or high head pressure might just have to clean the coils or check condensor fan.

First, make sure the refrigerant coils underneath the unit are not dirty. If so, clean them off.

Second, make sure the compressor (underneath the refrigerator) is running.

Third, make sure the compressor fan (underneath the refrigerator close to the compressor) is turning. This fan should always be turning when the compressor is running. It removes heat from the refrigerant coils and transfers it to the outside.

Fourth, make certain the evaporator fan (in the freezer, likely behind an access panel) is turning.

All of these conditions must be present for proper cooling.

Low on refirgerant, or dirty coil, or it was run on a cold night. Either way, the only way to take care of it is to start by running the fan only, and shutting the cooling off. This will melt the ice on the coils. It is going to make a mess. Have the unit serviced if it is not dirty, if it is dirty clean it with an approved cleaner. Your local hvac repair shop should be able to recommend a good cleaner.

Do not run it on maximum cool and fan on low. Freezes up all the time this way.