BeforeCallingService
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.
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.
PROBLEM | POSSIBLE CAUSE | SUGGESTED REMEDY |
UNIT WILL NOT RUN | No power to unit | Push reset button on power cord. |
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| Set Fan Control to position other than OFF. |
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| Make sure plug is firmly seated in outlet. |
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| Check for blown fuses, tripped circuit breakers. |
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LITTLE OR NO COOLING | Fresh air/exhaust damper open | Set vent to CLOSED. |
LITTLE OR NO HEATING | Obstructed indoor or outdoor airflow | Remove obstruction from indoor grille or outdoor louvers. |
(fan and compressor run) | Dirty air filters | Dirty air filter. Clean or replace, as needed. |
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| Unit undersized for application | Check with dealer to determine proper capacity unit for application. |
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LITTLE OR NO COOLING | Temperature Control not set properly | For cooling, turn Temperature Control to cooler setting. |
LITTLE OR NO HEATING |
| For heating, turn Temperature Control to warmer setting. |
(only fan runs) |
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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 |
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| adding condensate drain cup. |
| Unit oversized for application: | Check with dealer to determine proper capacity unit for application. |
| compressor cycles on and off frequently |
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MOUNTING SUPPORT NOT | Storm window frame installed in window | Some models require removal of storm window frame before |
INSTALLED |
| installation. |
FROST ON INDOOR COIL | Dirty air filter | Clean air filter by vacuuming or washing with water and mild soap. |
| Normal for low outdoor temperatures | Turning Temperature Control to warmer setting reduces occurrence |
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| and duration of frost. |
FROST ON OUTDOOR COIL | Normal for outdoor temperatures at or | Call for service only if unit does not heat room and you have |
(heat pump models only) | below 45°F | checked all problems and remedies listed under LITTLE OR NO |
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| HEATING. |
ODORS IN COOLING | Mold, mildew, or algae formation on wet | To reduce algae growth, use algaecide tablet in base pan; remove |
| surfaces | drain plug; add condensate drain cup and hose. Thoroughly clean |
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| unit. |
ODORS IN HEATING | Normal for first time electric heater is | Caused by dust accumulation during unused months. |
| used each season | Odor dissipates quickly with heater use. |
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