Question about LG BG8000ER Air Conditioner

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Not cooling properly. dismounting the front panel showed formation of ice on ac tubes

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Ice forming on the evaporator coil (you called it ac tubes) is a common sign of 'low' air flow across the coil.

The evaporator coil will 'ice' if the air flow is restricted.

This usually happens when the filter and or coil becomes dirty.

If the filter is changed often (when dirty) then the chances of the coil becoming dirty are reduced.

In any event - you must have a 'clean' filter and a clean coil.

The filter is usually made to be 'washed out,' and the coil can be cleaned with a wrag - or brush of some sort.

The goal is to make sure the filter and coil are both clean.

Other things can cause a coil to 'ice,' but are less likely.

a) low on refrigerant - not likely because the system is 'sealed' and the chances of losing gas are remote unless it's an older AC and has been 'opened' in the past - which improves the chances of a leak.

b) a problem with the fan motor - i.e. cutting off and then back on - or - not running as fast (both will reduce the air flow) as it should because of internal problems.

c) in a room with a 'low' load - i.e. the outside temp is low and the room is cool - thus causing a low load situation. This too is not likely as most AC's are being run because it's hot in the room.

Bottom line - is I would make sure my filter and evaporator coil are both clean and unrestricted.

good luck!

Posted on May 09, 2010

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