Why Your AC Isn’t Working – Common Issues and Solutions. Las Vegas summers are no joke. When your air conditioning system suddenly stops working, it can quickly turn into an emergency. If you find yourself asking, “Why isn’t my AC working?”, you’re not alone. At Active Plumbing & Air, we’ve been providing top-rated AC repair and maintenance services in Las Vegas for over 30 years. As a family-owned business, we pride ourselves on affordable pricing, great quality work, and outstanding customer service with a 4.9-star rating and over 819 Google reviews.
Why Your AC Isn’t Working
In this guide, we’ll walk you through the most common reasons why your AC may not be working, along with solutions to help you stay cool.
1. Thermostat Issues
Before assuming the worst, check your thermostat settings. If your AC isn’t turning on, it may be due to:
• Dead batteries in the thermostat
• Incorrect temperature settings
• A malfunctioning thermostat
Solution:
• Replace the batteries if needed
• Ensure the thermostat is set to “Cool” mode and the temperature is lower than the room temperature
• If the issue persists, consider upgrading to a programmable or smart thermostat for better control
Related Resource: Learn how to improve indoor air quality with a well-maintained HVAC system.
2. Dirty or Clogged Air Filters
A clogged air filter restricts airflow, making it harder for your AC to cool your home. Over time, this can cause the system to overheat and shut down.
Solution:
• Check your air filter monthly and replace it every one to three months
• Consider a high-efficiency pleated filter for better performance
Related Resource: Find out how to keep your HVAC system clean.
3. Tripped Circuit Breaker or Blown Fuse
If your AC isn’t turning on at all, it could be due to a tripped breaker or blown fuse.
Solution:
• Locate your home’s electrical panel and check for tripped breakers
• Reset the breaker if needed, but if it trips again, call a professional
Related Service: Need fast repairs? Schedule a plumbing and HVAC service with our certified technicians.
4. Refrigerant Leaks
Refrigerant is essential for cooling your home. If there’s a leak, your AC won’t cool properly, and you may notice:
• Warm air coming from vents
• Hissing or bubbling noises
• Ice buildup on the refrigerant line
Solution:
• Do not attempt to fix a refrigerant leak on your own—only licensed professionals should handle refrigerant issues
• Contact Active Plumbing & Air for a refrigerant inspection and recharge
Related Resource: Learn about the most common HVAC issues that may affect your system.
5. Frozen Evaporator Coils
If your AC is running but not cooling, frozen evaporator coils could be the culprit. Causes include:
• Low refrigerant levels
• Poor airflow from a clogged filter
• Dirty coils
Solution:
• Turn off the AC and let the coils thaw
• Check and replace the air filter
• Schedule routine AC maintenance to prevent future issues
Related Service: We offer affordable AC tune-ups—schedule your service today.
6. Faulty AC Compressor
The compressor is the heart of your AC system. If it fails, the system won’t be able to cool your home properly. Signs of a failing compressor include:
• Loud noises or vibrations
• Warm air from vents
• Higher-than-usual energy bills
Solution:
• Older compressors may need replacement
• Schedule a professional AC inspection to diagnose the issue
Related Resource: Learn when to replace your HVAC system.
7. Blocked or Leaking Ductwork
Even if your AC is running, leaky or blocked ductwork can prevent cool air from reaching your rooms.
Solution:
• Inspect your ducts for visible leaks or disconnected sections
• Seal leaks with professional-grade materials
• Schedule an HVAC ductwork inspection for long-term efficiency
8. Outdoor Unit Issues
The outdoor AC unit can get clogged with dirt, leaves, and debris, restricting airflow.
Solution:
• Turn off the power and clean the unit with a garden hose
• Keep at least two feet of clearance around the unit
• Schedule annual maintenance to keep it running efficiently
Related Resource: Learn about seasonal HVAC maintenance.
9. AC System is Too Old
If your AC is over 10-15 years old, frequent breakdowns may mean it’s time for a replacement. Newer models are more energy-efficient and reliable.
Solution:
• Consider upgrading to a high-efficiency air conditioning system
• Take advantage of rebates and financing options
Related Service: We offer AC installation and replacement services—contact us to learn more.
When to Call a Professional
If your AC still isn’t working, it’s time to call Active Plumbing & Air for expert HVAC repair in Las Vegas. We are:
✔ Certified by the Las Vegas Valley Water District
✔ Fully licensed and insured
✔ Available for emergency repairs
Schedule Your AC Repair Today
Don’t suffer through the Las Vegas heat! Our team at Active Plumbing & Air is here to provide fast, reliable, and affordable AC services.
📞 Call Us Today: 702-553-1171
📅 Schedule Online: Book an Appointment
Stay cool and comfortable all summer long with Las Vegas’ trusted AC repair experts!
Helpful Outbound Resources
For more information about HVAC maintenance and energy efficiency, check out these trusted industry resources:
• ASHRAE – American Society of Heating, Refrigerating, and Air-Conditioning Engineers
• Energy Star – Guide to energy-efficient HVAC systems
• U.S. Department of Energy – Tips on heating and cooling efficiency
By following these tips, you can avoid costly AC breakdowns and keep your system running efficiently. If you’re experiencing AC problems, don’t wait—schedule your repair with Active Plumbing & Air today!