Room Air Conditioner
6
Occurrence
Possible Cause
Solutions
Air conditioner will not operate
• Wall plug disconnected.
• Push plug firmly into wall outlet.
• House fuse blown or circuit breaker tripped.
• Replace fuse with time delay type
or reset circuit breaker.
• Unit turned off and then on too quickly.
• If air conditioner is turned off,
wait 3 minutes before restarting.
• Thermostat set too low for cooling.
• Adjust thermostat to higher setting for cooling.
Air from unit does not
• Thermostat set too warm.
• Set thermostat to colder temperature.
feel cold enough
• Room temperature below 70°F.
• Cooling may not occur until room
temperature rises above 70°F.
Air conditioner cooling,
• Outdoor temperature below 70°F.
• To defrost the coil set thermostat to warmer
but room is too warm —
position.
ice forming on cooling coil
• Dirty air filter — air restricted.
• Clean filter. See “Cleaning the Air Filter” section.
behind decorative front
Air conditioner cooling,
• Dirty air filter — air restricted.
• Clean air filter.
but room too warm —
Refer to “Cleaning Air Filter” section.
NO ice forming on cooling coil
• Thermostat set too warm.
• Set thermostat to colder setting.
behind decorative front
Noise when unit is cooling
• Air movement sound.
• The sound of rushing air is normal. If too loud,
turn selector to lower fan setting.
• Sound of fan hitting water-moisture
• This is normal when humidity is high.
removal system.
Close doors, windows and registers.
• Window vibration — poor installation.
• Refer to installation instructions —
check with installer.
Water dripping inside
• Improper installation.
• Tilt air conditioner slightly to the outside to
when unit is cooling
allow water drainage. Refer to installation
instructions — check with installer.
Water dripping outside
• Unit removing large quantity of moisture
• This is normal during excessively humid days.
when unit is cooling
from humid room.
Troubleshooting Guide
To save time and expense, check the following before calling an authorized service station.
