Why is my AC Blowing Warm Air?

There’s nothing worse than trying to relax inside on a hot day and finding out that your air conditioning unit is blowing warm air. Between the sunny weather and Colorado consistently reaching high temperatures during the peak of summer, having your air conditioning unit working in tip-top condition is a necessity.

It’s important to know the reasons why your air conditioner could be blowing warm air ahead of time so you aren’t stuck sweating this summer. The cause may even be something you can fix yourself. Here are some reasons why your AC is blowing warm air, and our suggestions on how to avoid and fix them.

Thermostat Settings

Always start by checking your thermostat settings. Your system should be set to “COOL,” your fan switched to “AUTO,” and your temperature set below the current room temperature. A faulty thermostat or thermostat that has lost power is usually a quick fix.

Dirty Air Filters

Replacing your air filter is extremely important, and having a dirty air filter clogging up your system tends to be the common culprit for your AC not working properly. If your air filter is dirty, then the passage of cool and warm air inside your ducts is blocked. This leads to your evaporator coils freezing which results in your air conditioner blowing out warm air. While you can change out your air filter during routine HVAC unit maintenance, you will need one of our professionals to clean your evaporator coil.

Dirty Condenser Coils

Your air conditioner’s condenser coils remove heat from the air and expel it outside of your house. Condenser coils are a part of your outdoor unit and therefore are exposed to elements over time that cause dirt and grime to build up on the coils, impeding the transfer of heat. You can prevent this by regularly checking your outdoor unit to make sure that there isn’t any dirt, leaves, tall grass, or debris that is blocking the condenser coils’ airflow.

Leaking Refrigerant

Your unit runs refrigerant through a closed system to cool your home. The refrigerant in your unit isn’t used up like gas, so being low on this means you have a leak. You will need to call an HVAC technician to locate and repair your leak before adding more refrigerant into your unit.

Whether you need to know how to troubleshoot your air conditioner, you would like a tune-up before the season or you need an AC repair, CT Heating & Air in Aurora is here to help. We service air conditioners throughout the Denver Metro Area. Call us or contact us online to get started!