When troubles occur, please check the following points before contacting a repair company.
Temperature setting may be higher
than ambient room temperature Lower the temperature setting
The heat exchanger on the indoor or outdoor unit is dirty
Clean the affected heat exchanger
The air filter is dirty
Remove the filter and clean it according to Instructions
The air inlet or outlet of either unit is blocked
Turn the unit off, remove the obstruction
and turn it back on
Doors and windows are open
Make sure that all doors and windows are
closed while operating the unit
Excessive heat is generated by sunlight
Close windows and curtains during periods
of high heat or bright sunshine
Too many sources of heat in the room (people, computers, electronics, etc.)
Reduce amount of heat sources
Low refrigerant due to leak or long-term use:
Check for leaks, re-seal if necessary and top off refrigerant