13
Troubleshooting
®
Room Air Conditioner Troubleshooting Guide
THE AIR CONDITIONER WILL NOT OPERATE
Check if … Then …
Power supply cord is disconnected. Firmly push the cord into a live wall outlet with proper voltage, (Page 2)
House fuse has blown or circuit breaker tripped. Replace the fuse with a time delay type or reset the circuit. (Page 2)
Power is OFF. Push ON/OFF Button to turn unit ON. (Page 5)
Temperature setting is warmer than room temperature. Set temperature to a lower setting. (Page 6)
Unit was turned OFF and ON too quickly. POWER SAVE feature does not circulate air continually. Set mode to COOL for constant air circulation.
(Page 7)
Timer shut unit OFF. Push ON/OFF Button to turn unit ON. (Page 5)
THE AIR CONDITIONER BLOWS FUSES OR TRIPS CIRCUIT BREAKER
Check if … Then …
House fuse has blown or circuit breaker tripped. Replace the fuse with a time delay type or reset the circuit. (Page 2)
Too many electrical devices are being used on the same circuit. Unplug or relocate electrical devices being shared on same circuit. (Page 2)
Unit is rated over 7.5 amps. Unit should be plugged into a single circuit outlet. (Page 2)
Unit is plugged into an extension cord. Do not use an extension cord to run the unit. (Page 2)
Unit was turned OFF and ON too quickly. Turn unit OFF and wait 3 minutes before restarting. (Page 5)
THE AIR CONDITIONER TURNS ON AND OFF BY ITSELF
Check if … Then …
Outside temperature is extremely hot. Set fan speed to HI to assist cooling of unit. (Page 8)
POWER SAVE feature is on. POWER SAVE feature does not circulate air continually. Set mode to COOL for constant air circulation.
(Page 7)
Timer turned unit ON or shut unit OFF. Push ON/OFF Button to turn unit ON or OFF. (Page 5)
THE AIR CONDITIONER DOES NOT COOL THE ROOM - ICE BEHIND FRONT PANEL
Check if … Then …
Outside temperature is below 60F Set mode to FAN ONLY and fan speed to HI to defrost coil. (Page 3)
Filter is dirty. Open front panel. Remove filter. Rinse or vacuum filter. Replace filter. Close Panel. (Page 10)
BTU size is too large. A lower capacity unit may be required depending on the size of the room being cooled. (Page 3)
THE AIR CONDITIONER DOES NOT COOL THE ROOM - NO ICE BEHIND FRONT PANEL
Check if … Then …
Filter is dirty. Open front panel. Remove filter. Rinse or vacuum filter. Replace filter. Close Panel. (Page 10)
Temperature setting is warmer than room temperature. Set temperature to a lower setting. (Page 6)
Room temperature is below 60F. Unit is not designed to cool below 60F. (Page 6)
Front of unit is blocked by furniture, drapes, blinds, etc. Clear away area in front of unit. (Page 2)
Back of unit is blocked by leaves, dirt, branches, etc. Clear away back of unit. (Page 2)
Doors, windows, registers, etc. are open. Close doors, windows, registers, etc. (Page 2)
Unit recently turned on. Allow time to cool a larger room. (Page 3)
Temperature sensor is touching the coil. Open front panel. Remove filter. Turn end of temperature sensor away from coil. Replace filter. Close
panel. (Page 10)
Excessive heat in the room being cooled. Use exhaust vents while cooking or bathing. Limit use of heat producing appliances during the hottest
part of the day. (Page 2)
Vent control is pulled open. Push in vent control for maximum cooling. (Page 9)
THE AIR CONDITIONER RUNS TOO MUCH
Check if … Then …
Current Unit replaced an older unit. Newer, higher efficiency Air Conditioner may run longer to cool the room. Total energy consumption
is less due to higher efficiency. (Page 3)
BTU size is tool small. A higher capacity unit may be required depending on the size of the room being cooled. (Page 3)
WATER DRIPPING FROM AIR CONDITIONER - INSIDE ROOM
Check if … Then …
Unit is not properly installed. Unit should be mounted on a 1/4” downward slope to the outside (1/2 bubble on a carpenter’s level)
to provide proper drainage. Reposition or shim cabinet as necessary. DO NOT drill drain pan.
WATER DRIPPING FROM AIR CONDITIONER - OUTSIDE ROOM
Check if … Then …
Room is hot and humid. Normal operation during hot and humid days. (Page 3)
THE REMOTE WILL NOT OPERATE AIR CONDITIONER
Check if … Then …
Batteries are not installed properly. Verify the plastic shipping strip is removed from the batteries and the batteries are installed properly.
(Page 5)
Red Light does not flash on the remote when the remote buttons are pushed. Verify the plastic shipping strip is removed from the batteries and the batteries are installed properly.
Install a new set of batteries. (Page 5)
The remote is pointed at the unit. The remote may not work properly when used at extreme angles to the front of the unit. (Page 5)
TYPICAL AIR CONDITIONER SOUNDS YOU MAY HEAR
Check if … Then …
High pitched horn or pulsating noise that cycles on and off. Compressor - Normal noise due to modern high efficiency compressors. (Page 3)
Rushing air sound. Fan / Motor - Normal noise of higher efficiency fans pushing air further into the room. (Page 3)
Pinging or swishing sounds. Condenser - Normal noise of water hitting the condenser to increase energy efficiency. (Page 3)
Gurgling or hissing sounds. Evaporator - Normal noise of refrigerant passing through evaporation. (Page 3)
Beeping. Electronic Control - Normal noise when electronic control settings are changed. (Page 3)
Vibration. Unit Vibration - Due to poor wall or window construction or incorrect installation. (Page 3)
D/817 TP 5-54 — Room Air Conditioner Troubleshooting Guide — Revision “A” — March 18, 1996 — Page 1 of 1 © Sears, Roebuck and Co.