Help Library: Help Library: [LG Air Conditioner Function] Why is the humidity not dropping in Dehumidification mode?

[LG Air Conditioner Function] Why is the humidity not dropping in Dehumidification mode?

Troubleshooting Residential air conditioner 03/03/2026

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<h2 class="tit">At a glance</h2>
      <p>
        The air conditioner pulls in warm, moist air and moves it across a cold
        indoor heat exchanger. As the air passes over the heat exchanger, it
        cools, and moisture in the air changes into water droplets on the heat
        exchanger surface.<br/>
        This water is called condensate, and it drains outside through the drain
        hose. The amount of condensate drained generally reflects how much
        moisture has been removed from the air.<br/>
        Because of how inverter systems operate, once the set temperature is
        reached during cooling, the outdoor unit may run more slowly (at a lower
        frequency) or temporarily stop.<br/>
        During this period, the indoor heat exchanger temperature gradually
        rises, so condensate may not form as steadily. When less condensate
        forms, dehumidifying decreases, and the air coming out can feel less
        cool and more humid. In this situation, the room humidity can increase
        temporarily.
      </p>
      
<h3 class="sub-tit">Why Does Humidity Rise During Cooling?</h3>
      <p>
        If the air conditioner's capacity is significantly larger than the room
        size, the room temperature can drop quickly. This causes the unit to
        enter <strong>[Fan Mode]</strong> more often. This can make this symptom
        occur more frequently.<br/>
        This is normal operation and not a product issue. You can use the air
        conditioner with confidence.
      </p>      
<div class="img-only">
        <img src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=CwQb0d9K75YTcbCXat9B3A&amp;portalId=P1" alt="Cool air with no moisture / Hot air containing moisture / Evaporator /
Position with switch on heat exchanger"/>
      </div>
      
<div class="tip-box">
        <strong class="tip-tit">Note: Recommended Capacity for Floor-Standing Air Conditioners
        </strong>
        <p>
          The recommended capacity for a floor-standing air conditioner is
          approximately half of the home's total floor area. <br/>Since these
          units are typically installed in the living room (the largest open
          space), the coverage area is calculated based on this ratio.
        </p>        
<ul class="cause-list">
          
<li>
            Example 1) For a 120 m² home, a unit with 60 m² coverage is
            recommended.
          </li>
          
<li>
            Example 2) For a 130 m² home, a unit with 65 m² coverage is
            recommended.
          </li>
        </ul>
      </div>

<h3 class="sub-tit">Humidity May Increase During [Auto Drying]</h3>
      <p>
        The [Auto Drying] function helps dry the water droplets that form inside
        the unit during air conditioner operation. During this period, the unit
        runs with fan-only airflow.<br/>
        During this process, water droplets on the heat exchanger can evaporate,
        which may temporarily increase indoor humidity. (If humidity rises
        during [Auto Drying], open a window to ventilate the room.)<br/>
        Even during cooling operation, once the unit reaches the target
        temperature, the unit runs with fan-only airflow. At this time, water
        droplets on the heat exchanger can evaporate, which may increase
        humidity.<br/>
        If the humidity does not go down or the room feels humid during use,
        lower the set temperature or set the fan speed to [High].
      </p>
      
<h2 class="tit">Try this.</h2>
      <p>
        If the outdoor unit compressor frequently slows down or stops,
        dehumidification may not be effective, and the room may feel humid even
        when the air conditioner is running.<br/>
        If the humidity does not decrease or the room feels humid during use,
        lower the target temperature or set the fan speed to [High].
      </p>
      <p class="help-txt">
        This guide was created for all models, so the images or content may be
        different from your product.
      </p>    </div>

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[LG Air Conditioner Function] Why is the humidity not dropping in Dehumidification mode?

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