The most common cause of high humidity is an air conditioner that’s failing to dehumidify as it should. The evaporator coils in your air conditioner are supposed to get rid of humidity. The evaporator will accept liquid refrigerant, then use it to cool your house.

Why is my AC not pulling out humidity?

It could be an HVAC system that’s underperforming to where the surface of the evaporator coil is not reaching the temperature ideal for removing moisture. Another could be, that maybe the system installed was oversized. Somebody didn’t run a heat load calculation on the home and installed a larger system than needed.

How do I get rid of humidity in my house with AC?





Fortunately, you can use your AC to lower indoor humidity.

  1. Set the Fan to AUTO. …
  2. Adjust Fan Speed. …
  3. Change the Filter Regularly. …
  4. Clean the Coils. …
  5. Install a Whole-House Dehumidifier. …
  6. Keep the Refrigerant Full. …
  7. Use a Thermal Expansion Valve. …
  8. Contact Us for Help.

Why is my house all of a sudden humid?

Everyday actions like cooking, washing the dishes, running the washing machine, taking a shower, sweating and even breathing can cause moisture to build in your home—especially if you’ve got a big family. Leaks. Moisture could also be entering your house through leaks and cracks in or around your home.

Should I turn on AC if humidity is high?

Humidity affects air conditioning negatively because it cancels out the cooling effect. When the humidity is too high, your home will feel warmer than it actually is. You’ll have to keep your air conditioning system running but won’t derive nearly as many benefits from using it.

How long should AC run to dehumidify?





about 15 to 20 minutes

Under ideal operating conditions, AC units should run for about 15 to 20 minutes before shutting back off. In mild weather, the cycles might be a bit shorter than this. Keep in mind that running for less than 10 minutes isn’t ideal because the air conditioner can’t dehumidify properly.

Will running AC fan reduce humidity?

Because the fan blows constantly, most of the moistures evaporates and gets blown right back into your house! So, quick recap: The AUTO setting lets your AC properly dehumidify your home by stripping the air of moisture and pushing that moisture outdoors.

How can I lower the humidity in my house quickly?

Run your exhaust fans whenever you have to cook or take a shower to keep that excess moisture out.

  1. Use a Dehumidifier. …
  2. Grow Plants that Absorb Humidity. …
  3. Don’t Boil Water on Especially Humid Days. …
  4. Dry Your Clothes. …
  5. Clean Your AC Filters. …
  6. Take Colder and Shorter Showers. …
  7. Replace Your Carpet.


Do dehumidifiers work?

According to the National Asthma Council, dehumidifiers change a room’s humidity level to a relative humidity of 30-50% by taking excess moisture out of the air. When this happens, mold, dust mites, and other allergens are less likely to survive.

Does central air remove humidity?

After the refrigerant absorbs the moisture and warmth from the indoor air, excess condensation drains out of your unit through the condensate pan underneath the evaporator coil. So, to answer your question; Yes, your air conditioner does remove humidity!

What should I set my AC humidity too?



Your HVAC system, in conjunction with a dehumidifier, should keep the humidity level in your home between 30% and 50%. That level should be at its highest point when the temperature is high and will drop as the temperature drops.

How do you lower humidity?

How Can I Reduce My Humidity Levels?

  1. Use Your Air Conditioner. …
  2. Actively Use Your Exhaust/Ventilation Fans. …
  3. Take Cooler Showers. …
  4. Fix Any Leaking Pipes. …
  5. Keep Your Gutters Clean. …
  6. Dry Your Laundry Outside. …
  7. Get a Dehumidifier. …
  8. Move Your House Plants.

Why is my house more humid than outside?

The reason behind humidity levels being higher inside than outside is largely due to poor ventilation as well as the use of air conditioners. Poor ventilation makes it so that there is less movement in the air, this allows for water to become saturated into the air.

Is 70 humidity in a house too high?

Research from the Building Science Corporation found that humidity of 70% or higher adjacent to a surface can cause serious damage to the property. The Health and Safety Executive recommends that relative humidity indoors should be maintained at 40-70%, while other experts recommend that the range should be 30-60%.