17
BEFORE CALLING SERVICE
PROBLEM
POSSIBLE CAUSE
SUGGESTED REMEDY
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 OR NO COOLING
LITTLE OR NO HEATING
(fan
and
compressor run)
Fresh air/exhaust damper open
Obstructed indoor or outdoor airflow
Dirty air filters
Unit undersized for application
Set vent to CLOSED.
Remove obstruction from indoor grille or outdoor louvers.
Dirty air filter. Clean or replace, as needed.
Check with dealer to determine proper capacity unit for application.
LITTLE OR NO COOLING
LITTLE OR 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
Weak building construction
Water hitting fan blade
Unit oversized for application:
compressor cycles on and off frequently
Tighten any loose parts.
Provide additional support for unit.
Normal in high humidity. Stop noise by removing drain plug or
adding condensate drain cup.
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
Normal for low outdoor temperatures
Clean air filter by vacuuming or washing with water and mild soap.
Turning Temperature Control to warmer setting reduces occurrence
and duration of frost.
FROST ON OUTDOOR COIL
(heat pump models only)
Normal for outdoor temperatures at or
below 45°F
Call for service
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 electric heater is
used each season
Caused by dust accumulation during unused months.
Odor dissipates quickly with heater use.
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 SERVICE IS REQUIRED
section.
WARNING
