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Air Conditioner is Cooling but Not Removing Humidity: What to do?

Humidity is a common problem in many homes, especially in summer. It can cause discomfort, damage to furniture and other items, and even health issues. If you’re experiencing high humidity in your home, it’s important to understand what’s causing it, why your air conditioning system may not be removing it, and the steps to prevent the problem, such as regular maintenance. Read on to learn more about why your house is humid with the AC running.

Why is My House so Humid with the AC On?

Several issues can cause high humidity in a house with the AC running. If you find that your AC is cooling but not removing humidity, you may be experiencing one of the issues below:

Weather conditions: High humidity levels indoors are often a result of high humidity levels outside. When the air outside is humid, it can seep in through open windows and doors, cracks, and other gaps.

Lack of ventilation: Poor ventilation can trap moisture and humidity, leading to high levels of humidity inside. This can be particularly problematic in bathrooms and kitchens, where moisture is created by the routine use of water and steam escaping from showers.

Improper insulation: Poor insulation can lead to temperature disparities, which can cause condensation and moisture buildup. This can be especially apparent in attics and crawl spaces.

Water leaks: Leaks from plumbing, roofs, or windows can cause moisture to accumulate, leading to high humidity levels.

Any of these issues can create excess humidity in your home which will need to be removed to prevent issues like mold, bacteria, or damage.

Why Isn’t The Air Conditioning System Removing Humidity?

While air conditioning systems are designed to remove humidity from the air, there are several reasons why they may not be effective. If you are in a situation where you are wondering why your house feels humid with the AC running, you might find the answers to your question in one of the reasons below.

Oversized or undersized unit: If your air conditioning system is too large or too small for your space, it may not be able to remove humidity effectively. An oversized AC unit will cool the air too quickly, leaving moisture behind. An undersized AC unit will not be able to cool the air adequately to remove moisture.

Poor maintenance: If your air conditioning system is not maintained regularly, it may not be functioning at its optimal level. Dirty filters, clogged drains, and other issues can prevent the system from removing humidity effectively.

Thermostat issues: If your thermostat is improperly set or malfunctioning, your AC system may not be removing humidity as well as it could. For example, if the fan is set to “on” instead of “auto,” it will circulate humid air throughout the home instead of removing it.

Aging systems: If your air conditioning system is old or inefficient, it might not remove humidity effectively. Older systems aren’t always designed to remove humidity as most modern units do. Systems that have lost efficiency due to age, use, or lack of proper maintenance, might not be able to cool the air sufficiently to remove moisture.

How to Correct the Problem

If have asked yourself, “Why is my house so humid with the AC on?” and considered the possible problems, you can now look for a solution. If you are experiencing high humidity levels in your home, there are several steps you can take to correct the problem:

Use a dehumidifier: A dehumidifier effectively removes moisture from the air in your home. These devices pull in humid air, remove the moisture, and then release the drier air back into the room.

Improve ventilation: Installing exhaust fans in bathrooms and kitchens, opening windows, and adding ventilation systems can help to reduce humidity levels in the home.

Add or replace insulation: Adding insulation to walls, attics, and crawl spaces will help prevent hot and cold spots and reduce moisture buildup.

Seal air leaks: Repairing any air leaks in your home will help to prevent moisture buildup and reduce humidity levels.

Don’t skip maintenance: Regular maintenance of your air conditioning system, including cleaning the filters, checking the refrigerant levels, and ensuring proper drainage, will keep it functioning at its optimal level and removing humidity effectively.

Upgrade your system: If your air conditioning system is old or inefficient, replacing it with a new, more efficient system with a high SEER rating can help to improve how well humidity is removed from your indoor air. Here are how some of the different AC systems stack up when it comes to removing humidity:

  • Central air conditioning systems with variable-speed blowers can run at a lower speed for longer periods, which allows them to remove more moisture from the air. This is because when air is circulated through the system at a slower pace, it has more time to come into contact with the cooling coils, which helps to remove more moisture.
  •  Heat pump systems work by removing heat from the air and circulating it throughout the home. When the air is cooled, it releases moisture, which can then be removed by the system’s evaporator coils. Because heat pumps can operate at lower temperatures, they are often more effective at removing moisture than traditional air conditioning systems.
  • Ductless mini-split systems are very efficient and effective at cooling and dehumidifying spaces. They work by circulating refrigerant between an outdoor unit and one or more indoor units, each of which has its own thermostat. Because they don’t rely on ductwork to circulate air, there is less opportunity for moisture to build up in the system.
  • Geothermal systems are highly efficient HVAC systems that use the earth’s natural temperature to heat and cool the home. Because they don’t rely on outdoor air to cool the home, they can be particularly effective at removing moisture from the air.                                                                      

When in doubt, contact American Home Water and Air

High humidity levels in the home can be a major problem, leading to discomfort, damage to furniture and other items, and even health issues. By understanding the issue and taking steps to rectify the situation, you can reduce humidity levels and enjoy more comfortable, healthy indoor air.However, if you’re still having ongoing issues with humidity, American Home Water and Air’s expert HVAC technicians are more than happy to help you with any issues you are experiencing with humidity so that you can stop asking why is my house so humid with the AC running. So give us a call – we can make sure your AC is running properly in no time!

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