There’s nothing more frustrating on a sweltering summer day than flipping on your air conditioner—only to feel warm air blowing from the vents. If your AC is suddenly acting more like a heater, it’s a clear sign something isn’t right. While some causes are simple and easily addressed by homeowners, others require the help of a licensed HVAC technician for AC repair in Moon, PA. Let’s take a look at the most common reasons your air conditioner might be blowing hot air and what you can do about it.
1. Start With the Thermostat
Before anything else, check your thermostat. It may seem obvious, but accidental changes happen more often than you’d think. Make sure it’s set to “cool” and that the temperature is set lower than the current room temperature. If it’s on “heat” or “fan,” that could explain the warm airflow. Once that’s confirmed, you can move on to checking your system’s performance.
2. Dirty Air Filters Restrict Cooling
Clogged air filters are one of the most common culprits behind AC issues. When filters get clogged with dust, pet hair, and other debris, they restrict airflow, causing your system to work harder and less efficiently. That restricted airflow can result in hot or lukewarm air coming from your vents. Make it a habit to check your filters every month during peak usage and change them if they look dirty. A clean filter is an easy and effective first step toward restoring cool comfort.
3. Blocked or Dirty Outdoor Unit
Your air conditioner’s outdoor condenser unit plays a crucial role in cooling your home. If it’s covered in dirt, leaves, or other debris—or if surrounding plants have grown too close—it can’t effectively release heat. Trim any overgrown vegetation to leave at least two feet of clearance around the unit and gently hose off any buildup on the coils or fins. Never use a pressure washer or harsh tools, as this could damage delicate components.
4. Frozen or Dirty Evaporator Coils
If your evaporator coils inside the air handler are dirty or frozen, they can’t absorb heat efficiently. A layer of ice may even block airflow completely, resulting in warm air blowing through your vents. While you can turn the system off and allow any ice to melt, cleaning and inspecting evaporator coils is a job best left to the pros to avoid damaging the system.
5. Low Refrigerant or Mechanical Issues
If basic maintenance doesn’t solve the problem, you may be dealing with a more serious issue such as a refrigerant leak, failing compressor, or electrical fault. These problems can’t be fixed with DIY methods and require professional equipment and expertise to diagnose and repair. Continuing to run your system under these conditions could cause further damage so get AC repair right away.
Call the Pros for Fast, Reliable AC Repairs
If you’ve checked your thermostat, changed the filter, cleaned around the outdoor unit, and you’re still sweating it out—don’t wait. Reach out to our expert HVAC team. We’ll diagnose the issue, get your system running right, and restore cool comfort to your home safely and efficiently.
Call the friendly staff at Boehmer Heating & Cooling for exceptional customer service! Schedule AC repair in Moon, PA with our team today.