Why is my aircon increasing relative humidity?
For an A/C unit to reduce the % of relative humidity in your home a properly sized A/C unit coupled with a dehumidifier must run a long time to decrease that humidity. When the A/C unit is first turned on, it begins to cool the room temperature which may actually increase the relative humidity. Just because the room temperature is reduced does not mean that the humidity has also been reduced. It usually takes a long time to reduce the % of relative humidity, that is why you should set the temperature and let the unit run 24/7. Remember, every thing in that room is at the same approximate relative humidity and temperature, (floor surfaces, furniture, etc).If you look up or search for the explanation of relative humidity you will get a good understanding of the term and how it is derived. After the units have run a couple days the % of relative humidity is still excessive then I would look for sources of the excessive humidity, say a leaking pipe, a wall opening, or a source of moisture.