Are you sure it's not shutting down for another reason, like
condensation or restricted airflow?

Dan wrote:
I just bought an LG 8000 BTU window air conditioner, model LWHD8000RY6.
The unit has a digital thermostat, which on its lowest setting displays
60 degrees. However, it is not possible even on this lowest setting to
get the machine to put out cold air below about 69 degrees. Note I do
not mean the machine does not have the capacity to cool the space (a
bedroom of about 175 sq') below 69 degrees, but rather, the thermostat
shuts the compressor off at 69, even when it is set at "60".