“Inside the house, I feel sticky and sweaty all the time, even when my air conditioner or the HVAC unit is always on.” Is this true for you? If yes, this article is just the answer to your troubles. The cause of this sultry and clammy feeling is high humidity. When the humidity inside the house increases, it makes you feel uncomfortable and irritable. A common query that we are constantly hit with is, “Why is my air conditioner not removing humidity?”. Today, we shall try and address this question and let you understand why your ac is unable to dehumidify the air.
How Does AC Remove Humidity
In an ideal scenario, your AC brings down the humidity level by circulating the hot and humid air of your home over the cold and refrigerant filled evaporator coil. Due to this interaction between air and cold coils water vapor present in the air condenses and forms water droplets. These droplets collect in the drain pan from which they are pumped out through the drain line. In other words, the AC sucks out humidity and sends out cool and dry air.
Reasons Behind Air Conditioner Not Removing Humidity
Often you face high humidity levels inside the house. It mostly happens because although the AC is cooling the home, it is still not getting rid of the humidity. The mains reasons behind this malfunction are –
➢ Thermostat Not Set To “Auto” – Most of you will be surprised to know that the thermostat setting controls the blower fan of your air conditioner. When it is set to “Auto”, the blower fan turns on only when the home is hot and needs cooling.
While when set to “On”, the fan works continuously even if the house does not need any cooling. What happens, in the latter case, is that the AC is unable to dehumidify the air efficiently. So, the next logical question would be, “Why is that so?”. The answer is straightforward. When the fan runs continuously, it picks up the condensed water droplets and circulates them back inside the house. Hence, the humidity is almost the status quo.
How To Fix – Fixing the problem is as simple as changing the thermostat setting to “Auto”. Once done, you should ideally have no more problems.
➢ Dirty Air Filters & Evaporator Coil – The air filters prevent the dust and grime from finding their way inside the air conditioner unit. Over a period of time air filters tend to get dirty and prevent the easy passage of air into the unit.
Once these filters are clogged, the evaporator coil becomes vulnerable to getting dirty itself. When dirt starts accumulating on the coil, it forms a layer. This layer of dirt prevents the evaporator coil from cooling the air sufficiently. As such, it fails to suck out the humidity from the air.
How To Fix – To begin with, regularly clean the air filters. At least once a month is advisable. If they are completely clogged and cannot be cleaned, change them as soon as possible. When it comes to cleaning the evaporator coil, that is something to be handled by an HVAC professional only. So book an appointment immediately.
➢ Leaking Ducts – Leaks in the HVAC ductwork could be adding to the humidity inside the home. In homes, usually, the attic houses the HVAC unit and its ducts.
Any leak on the return side of the ducts would mean that your air conditioner is sucking in the hot and humid air from the attic. When that happens, the AC unit is unable to condense all the extra water vapor that is added to the air supply because of the leaking duct. In turn, no matter how long you run the AC, you still feel clammy.
How To Fix – To fix this problem, you need to book an appointment with the HVAC technician. They can identify all sources of leaks and block them most effectively.
➢ Oversized AC – Yes, size does matter. The bigger is not always better. An oversized AC cools your home rapidly. Since when did rapid cooling become a problem? Rapid cooling is definitely a problem because an AC has to function at a fixed pace, which is the right pace. Dehumidification is not a quick process. It takes time for the evaporator coil to suck the moisture out of the air and condense it. However, when rapid cooling happens, the dehumidification cycle suffers and is unable to give optimum output. Therefore, your house appears sufficiently cool but is still humid.
How To Fix – If your AC is brand new and can still be replaced, get a professional AC contractor to let you know the correct size for your home. IF your AC is a couple of years old and can’t be replaced due to financial constraints or because it still has a few years of life left, invest in a whole-home dehumidifier.
When To Call A Professional
Air conditioner not removing humidity even after you have done everything at your end to contain it, i.e., cleaned the air filters, checked for leaks and adjusted the thermostat. And yet nothing seems to give relief. The humidity is still unbearable. It’s time to call a professional for help. They are trained and certified to offer the best advice and render the most appropriate solution.
Living in a humid environment literally sucks. Comfortable living is everybody’s right, so why suffer unbearable living conditions? Why add to the unnecessary problem by extending the discomfort? Give us a call today on our toll-free number 1-888-729-8452 and book an appointment. At Aztil air conditioning is not something we do for a living but something we live to do. Our elite team is available at your service seven days a week, 24 hours a day.
Frequently Asked Questions – FAQs
The most common reason your AC is not pulling out humidity is that heat load calculation or sizing of the home was not done when purchasing the unit. And like many homeowners, you have now landed up with an oversized unit. Since an oversized unit cools the home faster, its cycles are short, due to which it fails to remove adequate humidity.
When the air conditioner’s capacity is too big for your home, it works in shorter cycles, also known as short cycling. The problem with short cycling is that it cools the home faster but does not remove the humidity adequately. Therefore, your house will still feel humid even with the AC on.
It is possible to control humidity to a certain extent using an air conditioner. For that, always follow the recommended temperature settings for the season, ensure the air filter is not clogged, and the fan setting on the thermostat should be on “Auto.” Also, the newer models of air conditioners have a “Dry Mode,” which you can use when the humidity is excessive.
Some cheap methods to dehumidify your home in summers are:
1. Keep surfaces dry.
2. Ventilate your home.
3. Use the exhaust fans.
4. Improve the insulation in your home.
5. Add indoor plants.
6. Do laundry less frequently.
On the other hand, if you don’t mind spending some money, a more viable option is to buy a whole-home dehumidifier.
The primary job of an air conditioner is to cool the warm indoor air, but its secondary benefit is that in doing so, it also reduces humidity. As the warm air passes over the cold evaporator coils, the excess moisture present in the air condenses to form water droplets and drips down into the drip tray from where it is expelled outdoors via the drain line. This way, excess humidity is removed.