mold in between heater fans

How to Stop Mold Growth in Your Heating & Air System


Mold may be a significant concern and lead to health issues for those who are susceptible to it. This is something that the majority of people are aware of. But were you aware that mold may also develop in your heating, ventilation, and air-conditioning system? If not, then you should read this article on my site. 

In this section, we will go over some of the most effective strategies for preventing mold growth in the HVAC system of your house, so that you will never have to worry about the issue again.

Do you need a service for your HVAC system in Illinois? Get in touch with Oak Lawn HVAC.

What You Can Do to Stop Mold Growth

Remove the Clog from Your Drain Tubes

Mold may develop in your heating, ventilation, and air conditioning system if its drain tubes get clogged, which is one of the most typical ways this can happen. If there is a condensate drain tube, it has to be attached to some kind of drainage or catch bucket so that moisture does not accumulate and pose a problem. Mold may thrive in environments like this one because of the presence of moisture.

Check Everywhere That Air May Enter

Another typical method that mold can get into your HVAC system and create a problem is if it is able to sneak in from locations other than the drain tubes. In this case, you will need to check anywhere that air can enter. You may, for instance, have a return air duct or grills on the outside of your house, which are entry points for air that has not been conditioned. In the event that this occurs, mold will have the chance to form inside of your HVAC system, which can lead to a variety of issues for you.

Your Ductwork Should Be Insulated

When you have ducts going through unconditioned regions, it stands to reason that they may retain moisture and allow mold to develop in your HVAC system. This can be prevented by properly insulating your ductwork. Because of this, it is essential for you to make certain that any ducts going through unconditioned regions are insulated so that they do not retain moisture, which may provide a climate that is ideal for the formation of mold.

Ensure Appropriate Drainage

If you have a condensate drain or another type of tube that’s supposed to move water away from your unit, then it obviously needs to be draining properly so that moisture doesn’t build up and cause mold growth in your HVAC system. This can be done by ensuring that the proper drainage is occurring.

Cleaning the Air Filter

Another typical issue that may arise with your heating, ventilation, and air conditioning system is if the air filter gets clogged. The purpose of air filters is to prevent dirt, debris, and other particles from entering your unit. Because of this, it is essential that air filters do not get clogged, as this may result in the formation of mold due to the damp environment that is generated when airflow is restricted.

Ensure Adequate Ventilation

If you own a furnace or an air conditioner, then it goes without saying that you also own some kind of venting system that enables the conditioned air to be distributed throughout your house. In the event that this is not put correctly and in the event that it is blocked in any way, then there is a possibility that mold may form on the inside since there will be no way for moisture to escape.

When You Discover Mold in Your Heating or Air System

In the event that you find that there is mold development in your air conditioner or HVAC system as a whole, there are a few steps that you need to do in order to remove the mold completely. The first thing that needs to be done is to get in touch with an expert in air quality who can guarantee that all of the places that have been impacted by this problem are addressed in the appropriate manner so that they do not create difficulties in the future. 

Next, make sure that your HVAC system is meticulously cleaned since the mold has probably grown up over time and you will want to make sure that it is all gone before it begins to develop again. In this case, you may want to consider hiring air conditioner repair specialists in Illinois that are equipped with the appropriate instruments for the task at hand.

Signs that You Need to Get Your AC Fixed

You have been depending on your air conditioner for quite some time at this point in the summer, but there is still quite a bit of time remaining in which you need it to operate at a high level. 

This entails keeping an eye out for indications that anything is amiss and placing a repair call for your Oak Lawn air conditioning unit as soon as you become aware that something is wrong. Obviously, not everyone is aware of the indicators that indicate that an air conditioner needs maintenance. Therefore, I will list seven things for you to keep an eye out for.

Warm Air Expelled from Vents

If you find that warm air is flowing out of your vents even when the air conditioner is turned on, the first thing you should do is check the thermostat. If the settings are right, the problem is most likely with the air conditioner itself or another component of the HVAC system.

Poor Air Flow

Try putting your palm over a vent to get a sense of how forceful the air is there. If it seems to be less powerful than you remember it being, the problem is either with the motor or the filter. In any case, you need to get the AC repaired.

Rapid Cycling

When it’s really warm outdoors, your air conditioner needs to turn on and off more regularly. If, on the other hand, you see that the cycle occurs at a rate that is disproportionately quick for the temperature outside, this may indicate that your air conditioner is in need of some basic maintenance.

An Excessive Amount of Moisture

Even though it might be humid in Oak Lawn, you shouldn’t let that humidity inside your house. Your air conditioner should be able to keep the humidity under control. If it isn’t, then it can be a hint that you need to get a new air conditioner.


Condensation is a natural byproduct of the operation of any and all air conditioning equipment. Nevertheless, this shouldn’t make its way into our house. If it occurs, it’s a sign that the air conditioning isn’t working properly, and the moisture is putting your health in danger.

Foul Odor

The presence of a foul odor emanating from your vents indicates that there is a problem. It’s possible that this is somehow connected to your air conditioner. However, the odor may also be produced by a variety of different things. In any case, you will want to have an Oak Lawn HVAC service take care of the problem for you.

Do you need assistance protecting your HVAC system from mold? Get in touch with Oak Lawn HVAC, and we will immediately begin working to make your house a more secure environment.

Related Content


We are fully licensed, insured, and bonded. Our team of technicians is certified in the HVAC industry. 

Whether it’s air conditioning and furnace repairs, installations, or detailed maintenance services, we can do it!


Call today for questions or to schedule a consultation with us NOW!