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TROUBLESHOOTING
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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. ✔ Wait 3 minutes before restarting.
• Thermostat set too low for cooling. ✔ Adjust thermostat to lower temperature.
Air from unit does not • Unit in Fan mode. ✔ Set Mode to Cool.
feel cold enough • Temperature set too high. ✔ Set thermostat to lower temperature.
• 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 mode to Fan.
but room is too warm — Then, set thermostat to warmer temperature.
ice forming on cooling coil • Dirty air filter — air restricted. ✔ Clean filter. See “Cleaning the Air Filter” section.
behind decorative front To defrost, set mode to Fan.
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 temperature.
behind decorative front
Noise when unit is cooling • Air movement sound. ✔ The sound of rushing air is normal. If too loud,
Fan Speed to Low setting.
• Sound of fan hitting water- ✔ This is normal when humidity is high.
moisture 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.
Insufficient Cooling
• Shut all windows and doors in room.
• Remove any obstructions from inside and outside louvers.
• Close Air Exchanger.
• Inspect filter and clean if dirty.
• Under certain conditions the cooling coils directly behind
the filter, may ice up and block the airflow. This is a
common occurrence in air conditioners caused when the
outside temperature drops below 70°F (21°C) while the
humidity remains high. If this happens, simply turn the unit
off and allow the ice to melt, then resume normal
operation.
Service
To save time and expense, check the following before calling an authorized service station.
For Models Installed in North America - If Service or Parts are Required First, make the recommended checks. If it appears that
service or parts are still required, see your room air conditioner warranty “How to Obtain Warranty Service or Parts”.
For Models Installed Outside North America For room air conditioners purchased for use outside North America, the
manufacturer does not extend any warranty either expressed or implied. Consult your local dealer for any warranty terms
extended by the importer in your country.
Troubleshooting Guide
Proper use and care of your air conditioner will help ensure longer life of the unit. It is recommended to annually inspect
and clean the coils and condensate water passages. Expense of annual inspection is the consumer’s responsibility.