When it’s scorching outside and your AC is running full blast, nothing’s more frustrating than feeling little to no relief inside your home. If your air conditioner seems to be on but your home isn’t cooling down, you’re not alone. This is a common issue faced by homeowners—especially in hot climates like Las Vegas. Let’s break down the most common causes and effective fixes so you can get back to enjoying a cool, comfortable home.
1. Dirty Air Filter
The Problem:
Air filters are your HVAC system’s first line of defense. When they become clogged with dust, dirt, and debris, airflow is restricted, which means less cool air gets into your home.
The Fix:
Check and replace your air filter at least once every 1–3 months, depending on usage and indoor air quality. If you have pets or allergies, monthly changes are ideal.
2. Thermostat Issues
The Problem:
Sometimes, the thermostat is the real culprit. It could be set incorrectly, placed in a bad location (like near a heat source), or malfunctioning altogether.
The Fix:
Double-check that your thermostat is set to “cool” and the temperature is lower than the current room temp. If it’s not responding correctly, try replacing the batteries or consulting a professional to test it.
3. Refrigerant Leak
The Problem:
Low refrigerant levels reduce your AC system’s ability to absorb heat, resulting in poor cooling performance. A leak is the most common cause of low refrigerant.
The Fix:
This isn’t a DIY fix. Call a licensed HVAC technician to locate the leak, repair it, and recharge your system to the proper refrigerant level.
4. Dirty or Blocked Condenser Unit
The Problem:
The outdoor condenser unit can get clogged with leaves, dirt, or debris, which hampers its ability to expel heat from your home.
The Fix:
Gently clean the condenser coils with a hose and remove any debris around the unit. Be careful not to bend the fins or damage components. Annual professional cleanings are also recommended.
5. Air Leaks and Poor Insulation
The Problem:
Even if your AC is working well, cooled air may be escaping through poorly sealed windows, doors, or uninsulated areas—especially in older homes.
The Fix:
Seal leaks around windows and doors with weather stripping or caulk. Upgrade insulation in attics or crawl spaces for improved efficiency.
6. Ductwork Issues
The Problem:
Leaky or disconnected ducts can cause cool air to escape before it even reaches your rooms. Dust buildup can also restrict airflow.
The Fix:
Have a professional inspect and seal your ducts. In some cases, a duct cleaning can drastically improve airflow and cooling performance.
7. Undersized or Aging AC System
The Problem:
If your AC unit is too small for your home or nearing the end of its lifespan, it may no longer be capable of adequately cooling your space.
The Fix:
Have an HVAC professional perform a load calculation to determine if your system is properly sized. If your unit is 10–15 years old, it may be time to consider a replacement.
8. Electrical or Sensor Malfunctions
The Problem:
Internal electrical issues or faulty sensors can prevent your AC system from functioning as it should, leading to inefficient or erratic cooling.
The Fix:
This requires diagnosis and repair by a certified HVAC technician who can identify and replace faulty components.
9. Closed or Blocked Vents
The Problem:
Furniture, rugs, or even closed vents can obstruct airflow into certain rooms, making it feel like your AC isn’t working.
The Fix:
Ensure all vents are open and unobstructed to allow cool air to circulate freely throughout your home.
Final Thoughts
If your AC is running but your home still isn’t cooling properly, don’t sweat it—literally. Many issues can be resolved with simple maintenance, but others may require expert attention. For reliable diagnostics, repairs, and professional HVAC service in Las Vegas, contact Elite Heating & AC Repair. We’re here to help you stay cool and comfortable, even during the hottest months.
Call us today or schedule a service online to restore your home’s comfort fast.
Business Name – Elite Plumbing, Heating & Air Conditioning
Address – 3085 E Post Rd, Las Vegas, NV 89120
Phone – 702-263-2665
Website – https://www.eliteheatingandacrepair.com/