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Room Air Conditioner
6
Occurrence Possible Cause Solutions
A
ir 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
t
emperature 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.