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Jun 7, 2024 9:30:00 AM by Logan Donahue

Why Your AC is Making a Dripping Noise: 5 Common Causes and Solutions

There's nothing quite like the comfort of a cool, air-conditioned home on a hot day. But what happens when your AC starts making an unsettling dripping noise? This sound can be annoying and might also signal a problem with your air conditioning unit. Let's explore some common reasons for this issue and how you can address them.

1. High Humidity Levels


During periods of high humidity, your air conditioner works harder to remove excess moisture from the air. This moisture collects and can create a dripping noise as it condenses and drips into the drain pan.


To reduce humidity levels indoors, consider using a dehumidifier. Ensure your AC unit is properly sized for your home, as an undersized unit may struggle to keep humidity levels in check. Regularly clean or replace air filters to maintain efficient airflow and reduce moisture buildup.

2. Faulty Installation


If your AC unit is not installed correctly, it could cause various issues, including improper drainage. An uneven unit or improperly installed drain line can lead to water accumulation and dripping sounds.


Have a professional HVAC technician inspect your unit. They can ensure it is level and that all components, including the drainage system, are properly installed. They can make the necessary adjustments or repairs if any issues are found.

3. Aging Components


As your air conditioner ages, components can wear out or become less efficient. Worn-out parts like the fan or compressor can lead to excess moisture buildup, causing a dripping sound.


Regular maintenance is key to extending the life of your AC unit. Schedule annual check-ups with a professional to inspect and service your system. If your unit is old and frequently experiencing problems, it may be time to consider a replacement.

Frozen evaporator coil in air conditioner4. Frozen Evaporator Coil


A frozen evaporator coil can occur due to low refrigerant levels, dirty coils, or restricted airflow. When the coil thaws, the accumulated ice melts and can create a dripping noise as the water drips into the drain pan.


Check and replace your air filter regularly to ensure proper airflow. If the coil is dirty, clean it or have a professional clean it for you. If you suspect low refrigerant levels, contact an HVAC technician to check for leaks and recharge the refrigerant as needed.

5. Condensation Drain Problems


The condensation drain line is responsible for removing the water your AC unit extracts from the air. If this drain line becomes clogged or disconnected, water can back up and cause a dripping noise.


Inspect the condensation drain line for clogs or disconnections. You can use a wet/dry vacuum to clear any clogs. Ensure the drain line is securely connected and slopes downward to facilitate proper drainage. Regular maintenance and cleaning of the drain line can prevent future issues.


A dripping noise from your AC unit is often a sign of an underlying issue that needs attention. By understanding the potential causes—high humidity, faulty installation, aging components, a frozen evaporator coil, or condensation drain problems—you can take appropriate steps to resolve the issue. Regular maintenance and professional inspections are essential to keeping your air conditioner running smoothly and efficiently.
If you’re unsure or uncomfortable handling these issues on your own, don’t hesitate to call a professional. They have the expertise to diagnose and fix any problems, ensuring your home stays cool and comfortable.
Contact ECI Comfort

If you live in the Delaware Valley/Greater Philadelphia area and would like to find comfort within your home, visit our website or give us a call at 215 - 245 - 3200 to learn more.

This entry was posted in Preventative Maintenance, Home Maintenance, Air Conditioning, Humidity

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