As summer approaches, ensuring your central air conditioner runs efficiently is crucial to staying cool and avoiding costly breakdowns. Here’s a detailed look at the ten most common central air conditioner problems, their causes, and practical solutions to keep your AC running smoothly.
1. Central Air Running Constantly
A properly functioning AC unit should cycle continuously to maintain the desired temperature. If it runs continuously, it could signal size, installation, or maintenance issues.
Solutions:
- Improper Size: Ensure your AC unit matches your home’s size. An oversized unit wastes energy, while an undersized one overworks. Consult an HVAC expert for proper sizing.
- Dirty Air Filter: Replace or clean the filter monthly to prevent restricted airflow.
- Dirty Coils: Have a technician clean the condenser and evaporator coils during annual maintenance.
- Thermostat Issues: Verify the thermostat settings and functionality.
- Air Leaks or Insulation Problems: Seal air leaks and improve insulation to reduce system strain.
- Blocked Vents: Check and unblock all vents and registers.
Reference: Energy Saver: Air Conditioning
2. Refrigerant Leaks
Low refrigerant levels, often caused by leaks, reduce cooling efficiency and can overwork the system. Due to limited availability, older units using Freon (R-22) may also face challenges.
Solution:
- Call a professional to identify and repair leaks and recharge the refrigerant. Consider upgrading to a newer system using environmentally friendly refrigerants like R-410A.
Reference: EPA: Refrigerant Transition
3. Water Leaks
Water pooling near the condenser unit can be normal during humid days, but continuous leaks or excessive water signals a problem.
Solution:
- Replace clogged filters.
- Avoid running the AC when outdoor temperatures are below 60°F (16°C).
- Schedule a tune-up to clear blocked drain lines or frozen coils.
4. Loud Noises
While a gentle hum is normal, screeching, grinding, or sudden loud noises indicate mechanical issues.
Solution:
- Stop using the unit immediately and consult a technician to inspect motors, fans, or other components for damage.
5. Bad Odors
Unpleasant smells, such as burning or chemical odors, can originate from ductwork or the AC system.
Solution:
- Turn off the system and address odors immediately. A technician can clean ducts and inspect the system for burning components or leaks.
6. Not Cooling Properly
When your AC runs but doesn’t cool, it could stem from simple errors or complex mechanical issues.
Solutions:
- Confirm the thermostat is set to “COOL.”
- Close windows and doors to maintain cool air.
- Replace clogged filters and clean condenser fins.
- Consult a professional for refrigerant leaks or ductwork issues.
7. Blowing Warm Air
Warm air from your AC can make hot days unbearable.
Solutions:
- Verify the thermostat is set correctly.
- Replace filters for improved airflow.
- Reset tripped circuit breakers.
- Contact a technician to address refrigerant leaks or system repairs.
8. Frozen Air Conditioner
A frozen AC unit reduces efficiency and can damage the system if ignored.
Solutions:
- Replace filters and increase the thermostat setting.
- Consult a professional to check for fan malfunctions, drainage issues, or refrigerant leaks.
9. Wrong Size Unit
An improperly sized unit can either overcool or fail to maintain comfort.
Solution:
- Work with a trusted HVAC company to calculate the right size unit based on your home’s square footage, insulation, and climate.
10. Tripping Circuit Breaker
AC units draw significant power; tripping breakers can signal electrical overload or malfunction.
Solution:
- Clean filters and the condenser unit.
- If the problem persists, have a professional inspect components such as motors, compressors, or wiring.
Why Regular Maintenance Matters
Routine maintenance prevents inefficiencies, high energy bills, and breakdowns. Regular servicing extends the unit’s lifespan, keeps warranties valid, and ensures a cool, comfortable summer.
Hillside Oil Heating & Cooling Can Help!
Our experienced technicians can handle all your AC maintenance, repair, and replacement needs. Contact us today to schedule service and enjoy peace of mind this summer.
Contact Us:
- Delaware: 302-738-4144
- Maryland: 410-398-2146
Learn More: Hillside HVAC Services
