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We have one of those LG split unit A/Cs in the bonus room over the garage. The coils in the unit inside the room start freezing up almost instantly. I cleaned the coils but they didn't really have anything in them to clean out. Would it be low on refrigerate or something? Figured the brain trust would know.

Yeah it's low.

Yep, likely no Freon.

Could be your evaporator fan...



Air-conditioners circulate coolant through the sealed part of the system, and move air across the cold condenser coils in order to chill the room. An electric fan passes warm air over the coils--the temperature of the air drops and the temperature of the coil rises. If no air is flowing -- as when the compressor is working but the circulating fan is not--the coil temperature may drop low enough to make ice. The problem might be as simple as a bad switch or fan motor. If a brand new unit ices over, the air- conditioner might not be assembled correctly. The fan might be installed backward or incorrectly wired.

It's one of the units that mounts on the wall and the rest of it is outside. Like this one http://www.lg.com/africa_en/split-air-conditioners. I'm thinking low freon too.

Vinci is asking if the fan is working on the inside portion.

Fan works on inside piece and blows cold air it will just start freezing up the coil on the inside unit almost immediately. Turn it off it thaws quick. It still blows cool just not cold as it should. And I know it shouldn't be freezing up. No freezing on the copper line going to the outside unit either. Outside fan working too.