Common Air Conditioning Problems

Common Air Conditioner Problems & How to Fix Them

In Minnesota, air conditioning isn’t just a luxury—it’s a must-have during the hot and humid summer months. Your A/C doesn’t just cool the air—it also removes excess moisture and humidity, which is essential in the Land of 10,000 Lakes.

When your A/C system stops working, it’s more than just an inconvenience—it can be a serious health risk, especially during extreme heat. Repairs can be costly, so it’s important to schedule regular maintenance and stay informed about common A/C issues.

Here are some frequent air conditioning problems and what you can do to fix them.

1. A/C Is Running, But Blowing Warm Air

If your air conditioner is blowing warm air, several factors could be at play:

Check the Air Filter

A clogged or dirty air filter can block airflow and even cause your A/C unit to freeze up.

✔️ Follow the manufacturer’s recommendations for filter changes.
✔️ Some filters need to be replaced monthly, while others can last up to three months.
✔️ Light test: Hold your filter up to a light source—if light doesn’t pass through, it’s time for a new filter.

Check the Thermostat

Your thermostat settings could be affecting your A/C’s performance.

✔️ Make sure it’s turned on and set to cool.
✔️ Ensure the inside is clean and free of dust buildup.
✔️ Keep the thermostat out of direct sunlight, which can affect temperature readings.

If the problem persists, a deeper issue with the system may be to blame, requiring professional attention.

2. Water Drips or Fluid Leaks

If you notice leaks or water pooling near your air conditioner, there are two likely culprits:

Refrigerant Leaks

If your A/C is low on refrigerant, it could mean:

✔️ The system was undercharged during installation.
✔️ There is an active leak that needs to be repaired.

Adding refrigerant won’t solve the problem if there’s a leak—a trained technician should:

✔️ Locate and fix the leak.
✔️ Test the repair before recharging the system.
✔️ Ensure refrigerant levels match manufacturer specifications for peak efficiency.

Refrigerant leaks are also harmful to the environment, so fixing them promptly is crucial.

Drainage Issues

Like air filters, the drain line can clog with dirt, dust, and lint, preventing proper drainage.

✔️ If the drain line clogs, the drain pan will fill up, causing water to leak from the unit.
✔️ During humid weather, check the condensate drain to ensure it’s flowing properly.

Blocked drainage can lead to water damage and system failure, so regular maintenance is key.

3. Strange Noises Coming from the A/C

If your air conditioner is making unusual sounds, it could signal a mechanical issue.

Screeching or Squealing Noises

🔹 Likely caused by a motor bearing issue or a faulty belt.
🔹 Adding lubricant to the oil port may help—but if the noise persists, call a professional.

Clanging, Rattling, Thumping, or Banging Sounds

🔹 These sounds typically mean there’s an issue with the motor or blower assembly.
🔹 Turn off the A/C immediately and call an expert to prevent further damage.

Smacking or Flapping Noises

🔹 This could mean something is stuck in the blower blades or housing.
🔹 Turn off the system, inspect for debris, and remove any obstructions.

Keep Your A/C in Top Shape with Regular Maintenance

Your air conditioning system plays a critical role in your comfort and safety, and regular maintenance can prevent costly repairs.

How to Maintain Your A/C System:

✔️ Schedule routine inspections to catch issues early.
✔️ Change air filters regularly to ensure proper airflow.
✔️ Check for leaks and drainage issues during humid months.
✔️ Listen for unusual noises that may indicate mechanical problems.

By taking preventative action, you can ensure your A/C runs smoothly all summer long!

📞 Need an A/C check-up? Visit our Contact Page to schedule a service with our experts!