Common AC Problems During Summer and How to Fix Them

Summer is when your air conditioner works hardest, and unfortunately, it's also when problems are most likely to arise. When temperatures soar, a malfunctioning AC can quickly become more than just an inconvenience. Understanding common air conditioning problems can help you identify issues early, potentially saving you from discomfort, costly repairs, or complete system failures.

In this comprehensive guide, we'll explore the most frequent air conditioner issues that occur during summer months, how to diagnose them, and when it's time to call in professional help.

1. Air Conditioner Not Cooling Effectively

One of the most common complaints during summer is that an air conditioner runs but doesn't adequately cool the space. This frustrating issue can have several causes:

Possible Causes:

• Dirty or Clogged Air Filters: When filters become clogged with dust and debris, they restrict airflow, reducing cooling efficiency.
• Low Refrigerant Levels: Refrigerant is the substance that actually creates the cooling effect. Low levels due to leaks will significantly impact cooling performance.
• Dirty Condenser Coils: The outdoor unit's coils can collect dirt, preventing efficient heat release.
• Incorrect Thermostat Settings: Sometimes the problem is as simple as improper settings.
• Undersized System: An AC that's too small for your space will struggle to cool effectively during peak heat.

DIY Solutions:

• Clean or replace air filters (should be done every 1-3 months)
• Clear debris from around the outdoor unit and gently clean the exterior fins
• Verify thermostat settings and battery function
• Close blinds and curtains during the hottest parts of the day to reduce heat gain
• Use ceiling fans to help distribute cool air more effectively

When to Call a Professional:

If your system still isn't cooling properly after trying these solutions, you'll need professional help. Refrigerant issues, in particular, always require a certified technician as refrigerant is regulated and potentially harmful.

2. Air Conditioner Constantly Running

An air conditioner that runs continuously without cycling off not only consumes excessive energy but also indicates an underlying problem.

Possible Causes:

• Improper Sizing: An undersized unit may run continuously trying to reach the set temperature.
• Dirty Condenser Coils: When heat can't be efficiently released, the system must work longer.
• Refrigerant Issues: Incorrect levels affect the system's ability to cool efficiently.
• Leaky Ductwork: Cooled air escaping through leaks forces the system to run longer.
• Extreme Heat: During unusually hot weather, your AC may run longer than normal.

DIY Solutions:

• Clean the outdoor unit and surrounding area
• Check for and seal any obvious air leaks around windows and doors
• Set the thermostat to a reasonable temperature (24-25°C/75-77°F)
• Ensure supply and return vents are open and unobstructed

When to Call a Professional:

If your system continues to run constantly after trying these solutions, professional diagnosis is needed. Issues with refrigerant, ductwork, or electrical components require specialized knowledge and tools.

"An air conditioner that never stops running is like a car idling in the driveway 24/7 – it wastes energy, causes unnecessary wear, and signals that something isn't right with the system."

3. Strange Noises From the AC Unit

Unusual sounds from your air conditioner often provide important clues about potential problems. Different noises typically indicate specific issues:

Types of Noises and Causes:

• Squealing or Screeching: Often indicates belt issues or motor bearing problems
• Grinding: Suggests problems with motor bearings
• Rattling or Vibrating: Could be loose parts or debris in the system
• Clicking (Persistent): May signal electrical problems
• Banging or Clanking: Indicates a loose or unbalanced part, particularly in the compressor or fan motor
• Bubbling or Hissing: Often points to refrigerant leaks

DIY Solutions:

• For rattling noises, check for and tighten any loose panels on the outdoor unit
• Remove any debris that might have entered the outdoor unit
• Ensure the unit is sitting level on its pad

When to Call a Professional:

Most unusual noises (especially grinding, screeching, or banging) warrant professional attention. These often indicate mechanical issues that require specialized repair and can worsen if ignored.

4. Water Leakage Around the Indoor Unit

Finding water around your indoor air handler is a common summer problem, particularly in humid regions where condensation is substantial.

Possible Causes:

• Clogged Condensate Drain Line: The most common cause, as algae and debris block the drain
• Cracked Drain Pan: Over time, the condensate collection pan can crack or corrode
• Improper Installation: If the unit isn't properly leveled, water may not drain correctly
• Frozen Evaporator Coil: When thawed, this can lead to excessive water
• Low Refrigerant: Can cause ice buildup that later melts and leaks

DIY Solutions:

• Locate the condensate drain line (usually a PVC pipe) and clear any visible blockages
• Some units have a drain line access port where you can pour a mixture of bleach and water (1:1) to clear algae
• Check that the unit is properly leveled
• Change the air filter, as a clogged filter can contribute to coil freezing

When to Call a Professional:

If water continues to leak after attempting these solutions, or if you suspect a refrigerant issue or cracked drain pan, contact a professional. Water damage can be extensive and mold growth is a concern.

5. AC Frequently Cycles On and Off (Short Cycling)

Short cycling—when your AC turns on and off frequently without completing a full cooling cycle—is hard on the system and reduces efficiency.

Possible Causes:

• Oversized Air Conditioner: A system that's too large for the space will cool quickly and shut off before properly dehumidifying
• Dirty Air Filter: Restricted airflow can cause the system to overheat and shut down
• Low Refrigerant: Causes the system to work inefficiently
• Thermostat Issues: Improper placement (in direct sunlight or near heat sources) or malfunctioning sensors
• Electrical Problems: Faulty wiring or components can cause irregular operation

DIY Solutions:

• Replace or clean the air filter
• Ensure the thermostat is away from heat sources and direct sunlight
• Check that all vents and registers are open and unobstructed
• Clean the outdoor unit to improve heat dissipation

When to Call a Professional:

If short cycling persists after trying these solutions, professional diagnosis is necessary. Electrical problems, refrigerant issues, or an improperly sized system require expert attention.

Preventive Maintenance to Avoid Summer AC Problems

Many summer AC problems can be prevented through regular maintenance. Here's a simple preventive maintenance schedule:

Monthly Tasks:

• Inspect and replace/clean air filters
• Clear debris from around the outdoor unit
• Listen for any unusual noises
• Check thermostat operation

Seasonal Tasks (Spring/Early Summer):

• Clean outdoor unit fins and coils (gently)
• Check condensate drain for clogs
• Inspect insulation on refrigerant lines
• Test system operation before peak heat arrives

Annual Professional Maintenance:

• Schedule a professional tune-up in spring before the cooling season
• Have a technician check refrigerant levels, electrical components, and overall system health
• Address any minor issues before they become major problems

Conclusion

Understanding common air conditioning problems can help you diagnose issues early and take appropriate action. While many simple problems can be addressed with basic maintenance and troubleshooting, don't hesitate to call a professional for complex issues, especially those involving refrigerant, electrical components, or major mechanical parts.

At AC Repair Poland, our certified technicians are equipped to diagnose and resolve all air conditioning problems, from minor maintenance to major repairs. Regular professional maintenance is the best way to avoid unexpected breakdowns during the hottest days of summer.

If you're experiencing air conditioning problems this summer, contact our team for prompt, reliable service throughout Poland.