18
Issue
Possible Cause
Solution
My air conditioner is not cooling
at all.
The unit is not operating in
cooling mode.
Set the unit to be in cooling
mode, and lower the set
temperature (pg. 14).
The compressor is not on.
The compressor may take up
to 3 minutes to turn on, or
longer if it is too warm.
The ambient temperature is
too high.
Lower the room temperature
to be below 90° F.
The filter may be dusty or
blocked.
Clean the filters (pg. 11).
The exhaust port is blocked.
Remove any obstructions in
the exhaust hose and port.
My air conditioner blows cold
air, but does not lower the room
temperature.
The unit is not vented.
The unit must be vented (pg.
8).
The area of the room is too
large.
Minimize the size of the area
to be cooled, i.e. adding a
drop ceiling. Use more than
one unit to cool the area, or
use a larger unit.
There are open windows and
doors.
Close any open doors or
windows.
There are too many heat
sources.
Remove or shut off additional
heat sources such as radio
equipment, servers, etc.
The room / garage may be
inadequately insulated.
Properly insulate the room to
be cooled, i.e. using
fiberglass.
The ambient temperature is
too high.
The unit may not work if the
room temperature is above
90° F.
Direct sunlight is heating the
room.
Close the curtains or pull
down the blinds to minimize
the amount of direct sunlight
entering the room.
The filter may be dusty or
blocked.
Clean the filter and replace it
if needed.
The condenser coils are dirty.
Carefully vacuum the coils
clean.
The air intake or exhaust ports
are obstructed.
Remove anything blocking
the ports.
Tip: Run the unit before it is needed. For example, run the unit in the morning before the area
gets hot, and continue to run the unit all day long in order to maintain a low temperature.
