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Maintenance and Service
Troubleshooting
The air conditioner may be operating abnormally when:
Problem
Possible Causes
The air conditioner is
unplugged.
The fuse is blown/circuit
breaker is tripped.
Air
conditioner
does not
Power failure.
start
Airflow is restricted.
The thermostat may not
be set high enough.
Air
conditioner
The air filter is dirty.
does not
cool as it
should
The room may have been
hot.
Cold air is escaping.
Cooling coils have iced up.
Ice blocks the air flow and
Air
stops the air conditioner
conditioner
from cooling the room.
freezing up
20 Room Air Conditioner
What To Do
Make sure the air conditioner plug is
pushed completely into the outlet.
Check the house fuse/circuit
breaker box and replace the fuse
or reset the breaker.
If power failure occurs, turn the
mode control to Off.
When power is restored, wait 3
minutes to restart the air
conditioner to prevent tripping of
the compressor overload.
Make sure there are no curtains,
blinds, or furniture blocking the
front of the air conditioner.
Turn the knob to a higher number.
The highest setting provides
maximum cooling.
Clean the filter at least every 2
weeks.
See the care and Maintenance
section.
When the air conditioner is first
turned on, you need to allow time
for the room to cool down.
Check for open furnace floor
registers and cold air returns.
See Air Conditioner Freezing Up
below.
Set the mode control at High Fan
or High Cool with thermostat at 1
or 2.
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