Gibson Air Conditioner Troubleshooting

If you noticed that the air conditioner suddenly started to work not as efficiently as it did before, or if it has completely stopped to switch on, then it is necessary to diagnose it for malfunctions. In some simple cases, you can repair it yourself without the help of specialists. Learn about the main causes of the malfunction in the table.

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.
Selector Control in OFF position.-Turn selector to ON-(some models) or the desired FAN-or COOL-setting.
Unit turned off by moving thermostat to a higher number and then immediately turning back to a colder number. Wait approximately 3 minutes. Listen for compressor to start.
Unit turned off and then on too quickly. Turn unit off and wait 3 minutes before restarting.
Thermostat set too low. Adjust thermostat to higher number for cooling.
Air from unit does not feel cold enough.Turn selector to a higher FAN or COOL position
Thermostat set too warm. Set thermostat to colder temperature.
Room temperature below 70?F (21?C). Cooling may not occur until room temperature rises above 70F (21C).
Temperature sensing tube touching cold coil, located behind air filter. Straighten tube away from coil.
Air conditioner cooling, but room is too warm — ice forming on cooling coil behind decorative front.Outdoor temperature below 70F (21C). To defrost the coil, set selector to FAN position. Then, set thermostat to warmer position.
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost, set selector to FAN.
Thermostat set too cold for night-time cooling. To defrost the coil, set selector to a FAN position.
Air conditioner cooling, but room is too warm — NO-ice forming on cooling coil behind decorative front.Dirty air filter — air restricted- Clean air filter. Refer to Care and Cleaning section.
Thermostat set too warm. Turn thermostat clockwise to a colder setting.
Thermostat set on low number. Turn thermostat to higher number.
Vent set at OPEN position. Set vent at CLOSED-position for maximum cooling.
Air directional louvers positioned improperly. Position louvers for better air distribution.
Front of unit is blocked by drapes, blinds, furniture, etc. — restricts air distribution. Clear blockage in front of unit.
Doors, windows, registers, etc. open — cold air escapes. Close doors, windows, registers, etc.
Unit recently turned on in hot room. Allow additional time to remove "stored heat" from walls, ceiling, floor and furniture.
Air conditioner turns on and off rapidly.Dirty air filter — air restricted. Clean air filter.
Outside temperature extremely hot. Set FAN on high speed to bring air past cooling coils more frequently.
Noise when unit is cooling.Air movement sound. This is normal. If too loud, turn selector to lower FAN-setting.
Sound of fan hitting water-moisture removal system. This is normal when humidity is high. Close doors, windows and registers.
Window vibration — poor installation. Refer to installation instructions or check with installer.
Water dripping INSIDE-when unit is cooling.Improper installation. Tilt air conditioner slightly to the outside to allow water drainage. Refer to installation instructions — check with installer.
Water dripping Outside-when unit is cooling.Unit removing large quantity of moisture from humid room. This is normal during excessively humid days.