Question about LG LWHD1800R Wall/Window Air Conditioner

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LG LWHD1800R air conditioner problem

I live in Sacramento, CA. I have an LG LWHD1800R window type air conditioner. It is mounted on the second floor with unobstructed south west exposure (there are no other window locations in which to mount it). We experience several days of triple digit weather here. The AC unit is three years old. My problem is that the unit does not sufficiently cool my living space. The compressor will only kick on for brief periods of time (15 - 45 seconds) at 30 to 45 minute intervals. When the compressor runs the unit does blow cold air; it simply does not run nearly enough to achieve any nearly significant cooling effect. When first installed the unit was a much more efficient cooler. The cooling capacity of the unit seems to have degraded steadily over time (i.e. continuously as opposed to a jump function), and, the way I recollect, it has been a function of decreased compressor activity. I've tried moving the thermistor around, away from the evaporator assembly, and even hanging it outside the unit to no effect. I keep the filter in front of the evaporator clean. I would assume that the compressor motor would have some kind of thermal protection. Could this switch degrade over time? Could the environment (2nd story, south west exposure, 105 degrees F) simply be too harsh for the unit? I'm particularly curious to find a solution that would explain a gradual degradation in cooling capacity; again, for the brief periods that the compressor actually runs, the unit does discharge marvelously cold air. Any help that you may give on this problem would be greatly appreciated.
Heated in Sacramento

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It sounds to me like the compressor is overheating and tripping on internal or external overloads. After the unit cools down again it will try to run for a little while. Then this cycle would start over. I would check the condenser coil for dirt and filth. This portion of the unit may be on the out and backside of the unit. You should at least be able to see light through the coil.

I believe the thermistor that you removed temporarily is used for a freeze situation. I do not believe that it is your problem. Good luck:)

Posted on Jun 18, 2008

5 year warranty. Call LG

Posted on Jul 01, 2008

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