I have a brand-new 5000 BTU Frigidaire window air conditioner, and it seems to work fine except that it doesn't reduce the humidity in the room. I turned it on last night, and the temperature was 81 °F with 63% humidity, and when I woke up this morning it was 72 °F with 70% humidity. I thought that dehumidification was necessary in how air-conditioners worked. How could an air conditioner cool the air without removing the moisture? Don't forget that the percentage humidity is RELATIVE. Cold air cannot contain as much moisture as warm air. For the same amount of water in the air, the relative humidity will increase as the temperature drops. By consulting a psychometric chart, I see your overnight run removed 19 grains of water per pound of dry air. If you rewarmed the morning air back to 81 deg F, the relative humidity would be about 52%. Or, if you cooled the initial air to 72 deg F without removing any moisture, you would get a relative humidity of around 88%. So despite the higher relative humidity reading, moisture was removed.

The moisture removed is a function of the temperature of the evaporator coils in the A/C unit and the volume of air flowing through it. As bib pointed out, the unit may not have been actually running that much, reducing the volume of air passing through the coil, and thus minimizing the dehumidification effect. If you continue to cool the same air and avoid introducing additional moisture, the humidity level will eventually be reduced. It will take some patience. Air conditioners need to be sized to the room they are in. The dehumidification process takes some time, so if you have an air conditioner that is more powerful than the room calls for, the compressor shuts off before the dehumidification takes place. A 5000 btu unit is considered appropriate for a room 100 to 150 sq. ft. That is a pretty small room, but if your is smaller, that might explain it. Also, be certain that the external air vent is closed, the baffles on the sides fit the windowframe tightly and that there is a foam filler between the raised sash and the outer window.

If these are not done, moist outdoor air could leak in.Browse other questions tagged repair hvac humidity or ask your own question.How do you add Freon to a window air conditioner? Adding Freon to a window air conditioner involves cleaning the air conditioner, attaching a new Freon container and allowing it to intake new Freon until the container is drained. While this task is usually performed by a refrigeration mechanic, a lay person can complete it by purchasing a Freon kit. How do you put Freon into an air conditioner? How do I know if my air conditioner needs Freon? How much Freon does a five-ton unit hold? Gloves and protective eye wear should be worn when adding Freon to an air conditioner. Refer to the air conditioning unit's user’s manual to ensure that the right type of coolant is used. After taking the air conditioner out of the window, lay it on a level surface near running water. Clear any dust or dirt from the coils, the louvers or shutters and the air filter.

Give these parts time to dry before putting the unit back in place. Do not switch on the power. Upon finding the air conditioner's compressor, remove both valves from the Freon kit. Follow the kit's instructions as to how to attach these valves to the lines of the compressor, and take out the Freon container. Purina Cat Food With YogurtAttach it to the valves, turn the unit on, and set the power to the highest level. Used Pipe And Drape BasesThis setting allows the air conditioner to draw the Freon into its coils. American Bully Pitbull Puppies For Sale In AlabamaObserve the unit for cooling temperatures. Once all of the Freon is drained from the container, turn the air conditioner off, unplug it, and remove the Freon container.

After closing off the compressor's main lines, it is safe to resume use of the unit. Do window air conditioners need Freon? Most window air conditioners do require Freon in order for them to work properly. There is a type of Freon referred to as R-22 or HCFC-22, and it was most ... How much Freon does my truck need? Most vehicles need 25 to 35 pounds per square inch of Freon on the low side if the vehicle is running with the air conditioner on its coldest setting and f... Car Parts & Maintenance How much Freon does a 3-ton air conditioning unit hold? A 3-ton air conditioning unit can hold 6 to 12 pounds of Freon, depending on the unit. The exact amount of Freon needed is determined by a variety of facto... What is an air conditioner coil? An air conditioner coil is the part that turns a liquid chemical such as Freon into a gas and absorbs heat while creating cool air. The coil functions as a... What is an air-handler system? When does the History channel air "Swamp People"?

What is the best portable AC and heater combo? How can you get a manual for your Rheem gas furnace? Where can you purchase a new oil tank? What is a Frost King electric heat cable kit?The Frigidaire 6,000 Window-Mounted Room Air Conditioner is designed to cool up to 250 sq. ft. and keep large rooms comfortable. Features 3 different fan speeds for cooling. Eight way air direction evenly distributes air throughout the room. Ready Select Controls allow you to select options at the touch of a button, while a remote control allows you to precisely control the temperature from across the room. ENERGY STAR rated for efficiency and savings on energy costs. 6,000 BTU's quickly cool a room Designed to cool rooms up to 250 sq. ft. 3 fan speeds adjust to your cooling needs with 8-way air direction to ensure air is distributed evenly 24-hour on/off timer lets you cool the room on your schedule Electronic controls let you easily select options and display the set temperature