As summer temperatures rise, your air conditioner becomes the most important system in your home. But constant use during heatwaves can push even a high-quality system to its limits. If you’ve noticed weak airflow, frozen coils, or your system is not turning on at all, we understand how frustrating that can be. In this guide, we’ll walk you through the most common AC problems during hot weather — and what to do about them.
If you’re searching for AC repair in Raleigh, NC, this guide will help you troubleshoot issues and know when to give us a call.
1. Weak or Warm Airflow
Symptoms:
- Air blowing weakly or not at all
- Air blowing but feels warm
Common Causes:
- Dirty or clogged air filters
- Blocked or closed vents
- Failing compressor or fan motor
- Leaky or obstructed ductwork
DIY Fixes:
- Replace air filters every 30–90 days
- Ensure vents are open and unobstructed
- Inspect outdoor unit for debris and clear it
When to Call a Pro:
If airflow issues persist after these steps, it’s time for a thorough inspection and repair.
2. Frozen Evaporator Coils
Symptoms:
- System runs but doesn’t cool effectively
- Ice buildup on unit or refrigerant lines
- Water pooling near unit
Common Causes:
- Dirty air filters restricting airflow
- Low refrigerant levels due to leaks
- Blocked return vents
- Malfunctioning thermostat
DIY Fixes:
- Turn off power to the system to allow coils to thaw
- Replace dirty air filters
- Ensure return vents are clear
When to Call a Pro:
If coils freeze repeatedly or you suspect a refrigerant leak, professional service is necessary to diagnose and fix the issue.
3. Refrigerant Leaks
Symptoms:
- AC not cooling effectively
- Hissing or bubbling noises from the unit
- Ice formation on refrigerant lines
Common Causes:
- Corroded or damaged refrigerant lines
- Factory defects or poor installation
- Wear and tear over time
DIY Fixes:
Refrigerant handling requires specialized training and certification. It’s best to leave this to one of our certified technicians.
When to Call a Pro:
If you suspect a refrigerant leak, contact us immediately to repair the leak and recharge the system.
4. Unit is Constantly Running
Symptoms:
- System runs continuously without cycling off
- Higher than normal energy bills
Common Causes:
- Thermostat set too low or malfunctioning
- Dirty condenser coils
- Leaky ductwork
- Undersized unit
DIY Fixes:
- Check and adjust thermostat settings
- Clean or replace air filters
- Inspect and clean condenser coils
When to Call a Pro:
If the air conditioning continues to run non-stop, we can assess the system’s size and efficiency, and make necessary adjustments or repairs.
5. System Not Turning On
Symptoms:
- No response when adjusting the thermostat
- No sounds or activity from the unit
Common Causes:
- Tripped circuit breaker or blown fuse
- Faulty thermostat
- Capacitor or contactor failure
- Wiring issues
DIY Fixes:
- Check and reset circuit breakers
- Replace thermostat batteries
- Ensure thermostat is set to “cool”
When to Call a Pro:
If basic troubleshooting doesn’t restore function, professional diagnosis and repair are necessary to safely resolve electrical or component issues.
Preventive Maintenance Tips
- Schedule preventative HVAC maintenance twice a year
- Replace air filters regularly
- Keep outdoor units clear of debris
- Monitor energy bills for unexpected increases
- Upgrade to a smart thermostat for better control
Fast, Reliable AC Repair in Raleigh, NC
At Jay’s Heating and Cooling, we understand the challenges of keeping your home comfortable during hot summers. Our experienced technicians are ready to diagnose and fix your AC issues promptly and efficiently. Whether it’s routine maintenance or emergency repairs, we’re here to help. Contact us to schedule your AC repair in Raleigh, NC and ensure a cool, comfortable home all summer long.