Question about Fujitsu 12C1 Air Conditioner

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Cooling problem Four units in total are connected to one fan outside. THe unit in my room used to give(last summer) really cold air...however recently its not that cold.(Ive had the unit for about a year now) The other 3 units havnt been used much at all and they give off really cold air. Is there any way to fix this problem??

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Check your unit for dust buildup or blocked filters. Clean as required.

Posted on Jul 15, 2007


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Posted on Jan 02, 2017


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6 Answers

Not cooling anywhere near what it claims.

Try to turn OFF the Music Mode Only.
Turning on Music Only Mode will disable voice and data calls..


Sep 07, 2008 | Soleus LX-140 Portable Air Conditioner

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Blows very cold air during dehumidify mode.

se this fact: God bless you
air conditioning system cools but does not dehumidify the room. The most common cause of inadequate dehumidification by an air conditioning system is the installation of a cooling unit which has too much capacity, or is "over-sized" for the space it is being used to cool. What happens is simple:

If an air conditioning compressor unit is oversized (too many BTUH of cooling capacity) what happens is it cools the room so quickly that the system does not move enough total volume of air across the cooling coil to remove much moisture before the room temperature has dropped to the A/C cut-off point.

In other words, an air conditioner needs to run longer, and move more total volume of air through itself to drop room humidity than it does to just cool the air. So "bigger" cooling capacity or higher BTU capacity for an air conditioning system is not necessarily better, and it can actually be a problem.

Sep 30, 2012 | Heating & Cooling

1 Answer

Bought 4 small Gold Star units in 2009. One quit cooling altogether, one blows slightly cool while the longer another stays on the less it cools. One did not cool well when it was new. All filters are in...

Download this illustration and then using a good multimeter start basic troubleshooting.

All residential window air conditioners have a cooling system made up of four primary components, a compressor, an evaporator fan, a control or switch, capacitor.When the thermostat is calling for a colder room temperature the compressor is energized. It is normally very quiet. The evaporator is always located on the front of the air conditioner. It also has silver fins. Be sure it is clean. Use a foaming type cleaner and rinse with plain water. Because the evaporator is absorbing heat, it is very cold to the touch. The temperature drop causes any humidity in the air to collect on the evaporator - sometimes called sweat. There is a fan inside the air conditioner that circulates the air for the evaporator and condenser coils. The circulating fan and compressor are running simultaneously. The fan motor has two fan blades attached to it on either end. The fan blade on the inside part of the unit continually draws room air over the evaporator coils, which are cold. The fan blade on the outside part of the unit continually draws fresh outside air over the condenser coils, which are warm. Because the evaporator coils are cold, they cause moisture in the room to collect on them, much like a cup of ice water on a warm, humid day. When the amount of moisture increases, it begins to drip down off of the coils into the bottom pan of the air conditioner.
If the compressor fails to start or the fan you may need to replace the capacitor.
You may need a hard start kit.

Thermostat control The thermostat on a window air conditioner works by sensing the air temperature entering the air conditioner. As the air entering the unit reaches the set temperature it will cause the compressor to turn off. The blower may continue to run depending on the selection chosen on the control panel. Digital thermostats work on a similar principle but display a more precise temperature.
Test for continuity with the multimeter between the two terminals . Warm you should read continuity (contacts closed). If not change it.
Selector switches The air conditioner selector switches allow the user to choose the fan speed. The compressor always runs at the same speed regardless of the settings. If low cool is chosen, for example, the fan runs at a slower speed but the compressor still offers the same cooling capacity. There are other switches to control louver operation and other features on some units.

Jul 23, 2011 | LG Goldstar GWHD5000 wall/window Air...

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Air conditioner is blowing hot air, it was installed 1995 , the top switch option is CONT FAN AUTO and bottom switch is HEAT OFF COOL and on the right is a dial from 10-30

First of all, what do you mean by hot air? DO YOU REALLY MEAN ROOM TEMERATURE AIR THAT JUST DOES NOT FEEL COLD? If this is a heat pump system, we need to look at it differently than if it is a gas or oil fired heater. Next, the thermostat control that says " auto"----- this actually means FAN switch to be in AUTOMATIC RUN or CONTINUOUS RUN mode. Leave it in auto mode and forget that it is there; this little switch confuses a lot of people. The dial that says 10-30 is centegrade temperature that translates to 50-87 degrees farenheit. In order to get air conditioned (cold) air, you must have thermostat fan switch on auto, the heat/off/cool switch on cool, and the 10-30 dial on 20 or 21 (68-70 f.) assuming the room temp is at least 72 degrees f. or higher. If you still do not get cold air, then there is a problem with the cooling circulation system which can be tripped circuit breaker to outside compressor unit, loss of freon refrigerant, bad control such as relay or reversing valve in outside unit, stuck heat sequencers or heat element relay that are giving you heat at the same time giving cold if it is a heatpump system. You will need a skilled service person to determine these problems. Goodluck, Macgivor

Nov 09, 2009 | Cell Phones

3 Answers

Uotside unit blowing cool air but hot on the inside

It sounds like you have a unit called a heat pump. When a heat pump unit is in cooling mode the outside unit blows hot air and the inside unit blows cold air. If the outside unit is blowing cold then the indoor unit is most likely blowing room temperature or warm air. It sounds like the thermostat could be controlling incorrectly or you could have a failed reversing valve which is the device that switches the unit from heating to cooling mode.

May 31, 2009 | Ruud UBHC Air Conditioner

1 Answer

We have a fujitsu air con model ast9lsbcw which blows cold air from the outside unit and the inside unit is not cooling the room.

Sounds like you have it in heating mode or it is low on charge. In cooling mode, the outside fan should blow hot air not cold.

Jul 30, 2008 | Heating & Cooling

2 Answers


F1, F2, and F3 are the strength of the fan blowing the air conditioner. F1 circulates the least amount of air, F3 the most. I generally find that if the air conditioner isn't getting the job done on F1, F2 will do it. I typically only use F3 if I just want to circulate air fast in my place for awhile. As far as what is "better" with closed vent or open, that depends on what you want to do. If you are using air conditioning on a hot day, then vent closed is better because it will cool only air circulating in your place. Vent open will allow fresh air in from outside, and if it's a really hot day, the air conditioner might have a harder time cooling off the fresh air than the circulating air inside your place (as it's continually being cooled repeatedly by your air conditioner).

Jun 10, 2008 | Goldstar M1003R Air Conditioner

2 Answers

My AC unit keeps freezing up on the copper lines going into the house from the outside unit. It also freezes up on the inside lines and the air is not cooling my home down.

Operate your air conditioner with the fan in the on position. But first turn the fan on, turn the temp up or shut the cooling off. Your coil is more than likely frozen over. At night when outside temperature drops the refrigerant pressure and temperature in the system also drops. This action can cause icing of the cooling coil, with the fan in automatic everything shuts down at the end of a cooling cycle. Thus no air movement to melt ice on previous cooling cycle.

May 09, 2008 | Heating & Cooling

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