Portable Air Conditioner Keeps Shutting Off

1. Air conditioners will stop cooling if the outside temperature drops below 60F because the unit thinks it has done its job. It would be more beneficial in this situation to open a window rather than burning energy with an air conditioner running.
2. Your unit is probably too large for your room and is "short cycling." This happens when cold air from an oversized unit bounces off the wall and back towards the unit, creating a room-temperature reading that's cooler than the actual temperature. This false reading causes the compressor to shut off before the room has truly reached your desired set-point. While the compressor is off, the "real" room air enters the intake grille, and the thermostat reads that the room is no longer at the set temperature, so it turns the compressor back on. Your unit cycles off and on approximately every two to three minutes to reach the set-point. While the air coming out of the unit is cold, the compressor does not remain on long enough to cool the entire room. The only solution is to correctly size the unit's capacity to the room size and demand.

If the problem persists or if the above does not seem to apply, you'll have to consult Haier: use the contact information here--https://www.contacthelp.com/haier/customer-service.