The 1C overshoot is not a problem for me as I guess this is to avoid short cycling. They (LG) told me the unit has a 1C buffer zone either side, when the unit reaches its set point of 21C then the unit should ramp down even further to maintain that, however if the temp continues to rise for instance overshooting to 22C the compressor is then told to switch off.

The issue I have is why is it not ramping down when it is approaching set point. The time it takes to overshoot 1C is approx 10minutes so plenty of time for it to ramp down but it still runs as if it is trying to achieve the set point.