Most air
conditioning units usually have built-in mechanisms that
automatically shut off the system if the desired temperature is
already met. Whenever there are problems that allow the A/C unit to
continue operating without turning off, its owner must have the air
conditioning unit checked. Usually, at least one of the three
components have problems if this situation happens.
The Thermostat is
Broken
The thermostat sets the
temperature the A/C need to cool the room. If the desired temperature
is reached, the thermostat sends signals to the rest of A/C to
automatically shut off the system. An air conditioning unit with a
broken thermostat may continue cooling the room or house beyond the
set temperature. Repairing or replacing the thermostat may fix the
unit.