15
The following is a list of problems that are sometimes encountered when using a room air conditioner. Possible cause
and suggested remedies are given for each problem. If the problem cannot be fixed using the suggested remedies, see
WHEN ASSISTANCE IS REQUIRED
section on the next page.
TROUBLESHOOTING
BEFORE CALLING FOR SERVICE, PLEASE REVIEW THE CHART BELOW
ISSUE
POSSIBLE CAUSES
POSSIBLE SOLUTIONS
UNIT WILL NOT RUN
• No power to unit
• Push reset button on power cord.
• Set Fan Control to position other than OFF.
• Make sure plug is firmly seated in outlet.
• Check for blown fuses, tripped circuit breakers.
LITTLE/NO COOLING
LITTLE/NO HEATING
(fan and compressor run)
• Fresh air/exhaust damper open • Set vent to CLOSED.
• Obstructed indoor or
outdoor airflow
• Remove obstruction from indoor grille or
outdoor louvers.
• Dirty air filters
• Dirty air filter. Clean or replace, as needed.
• Unit undersized for application
• Check with dealer to determine proper capacity unit
for application.
LITTLE/NO COOLING
LITTLE/NO HEATING
(only fan runs)
• Temperature Control not set
properly
• For cooling, turn Temperature Control to
cooler setting.
• For heating, turn Temperature Control to
warmer setting.
NOISY UNIT
• Loose front on
mounting assembly
• Tighten any loose parts.
• Weak building construction
• Provide additional support for unit.
• Water hitting fan blade
• Normal in high humidity. Stop noise by removing
drain plug or adding condensate drain cup.
• Unit oversized for application;
compressor cycles on and
off frequently
• Check with dealer to determine proper capacity unit
for application.
MOUNTING SUPPORT NOT
INSTALLED
• Storm window frame installed
in window
• Some models require removal of storm window frame
before installation.
FROST ON INDOOR COIL
• Dirty air filter
• Clean air filter by vacuuming or washing with water &
mild soap.
• Normal for low outdoor
temperatures
• Turning Temperature Control to warmer setting
reduces occurrence and duration of frost.
FROST ON OUTDOOR COIL
(heat pump)
• Normal for outdoor
temperatures at or below 45°
• Call Consumer Services at 844-472-2473 only if
unit does not heat room and you have checked
all problems and remedies listed under “Little or
No Heating.”
ODORS IN COOLING
• Mold, mildew, or algae
formation on wet surfaces
• To reduce algae growth, use algaecide tablet in base
pan; remove drain plug; add condensate drain cup
and hose. Thoroughly clean unit.
ODORS IN HEATING
• Normal for first time heater is
used each season
• Caused by dust accumulation during unused months.
• Odor dissipates quickly with heater use.
WARNING
To reduce the risk of electric shock, personal injury, or death, turn the fan control to the OFF position
and remove the unit plug from the wall outlet before doing any inspection or maintenance work