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Quick And Easy Steps To Prevent Water Dripping From Your Split AC Unit

Quick And Easy Steps To Prevent Water Dripping From Your Split AC Unit

Discovering water dripping from your split AC indoor unit can be a distressing sight. Apart from being an eyesore, it can indicate a potential issue with your air conditioning system. However, there’s no need to panic. In this article, we will explore the common reasons behind AC water leakage, how to troubleshoot and fix it, the associated costs, safety concerns, and tips for preventing future leaks.

Understanding The Causes Of AC Water Leakage

Before delving into solutions, let’s first identify the possible culprits behind your AC’s water leakage:

Quick And Easy Steps To Prevent Water Dripping From Your Split AC Unit
  1. Clogged Condensation Drain Line: The accumulation of dirt and debris during the dehumidification process can block the drain line, causing water to overflow.
  2. Damaged Drain Pan: Located beneath the evaporator coil, the drain pan collects condensed water. If it’s corroded or rusty, it can lead to leaks.
  3. Improperly Attached Drain Line: If the drain line becomes loose or disconnected, it can result in water escaping.
  4. Broken Float Switch: The float switch triggers the condensate pump to drain excess water. If it’s malfunctioning, the pump won’t work correctly, leading to leakage.
  5. Condensation Buildup: High humidity levels in summer can lead to excess condensation, which may overwhelm the system.
  6. Frozen Evaporator Coils: Blockages in airflow can cause the evaporator coils to freeze, leading to overflow in the drain pan.
  7. Dirty Air Filter: A clogged air filter restricts airflow, causing the evaporator coil to freeze, which can result in water leakage.
  8. Incorrect Installation: Incorrectly installed AC units may have unbalanced drain pipes, leading to water accumulation.

Troubleshooting And Repairing AC Water Leakage

Quick And Easy Steps To Prevent Water Dripping From Your Split AC Unit

To address AC water leakage, follow these steps:

  1. Turn Off the AC: Before troubleshooting, turn off the indoor unit to ensure safety.
  2. Clogged Drain Line: Pour water into the drain line to check for blockages. Clean it with a long brush and ensure water flows smoothly through it.
  3. Damaged Drain Pan: Clean the drain pan and patch any cracks with a water-resistant sealant. If it’s rusty, replace it.
  4. Condensation Buildup: Insulate ducts to prevent condensation from escaping.
  5. Frozen Evaporator Coils: Unblock airflow by cleaning air filters, return vents, and ducts to prevent the drain pan from overflowing.
  6. Dirty Air Filter: Thoroughly clean the air filter using water and a brush, ensuring it’s completely dry before reinstalling it.
  7. Incorrect Installation: Ensure the AC unit is on a level surface or use an AC pad to level it.

For issues involving a broken float switch, condensate pump, or disconnected drain lines, it’s best to consult a licensed HVAC technician for professional repairs.

Cost Of AC Repair

The cost of repairing an air conditioner varies based on the complexity of the issue and the type of unit. Here’s a breakdown:

AC Repair Cost According To Project Range

  • Low (Filter unclogging, system reboot): Approximately $175.
  • Average (Filter unclogging, system reboot, servicing, and cleaning): Approximately $350.
  • High (Drain cleaning, servicing, and coolant checking): Approximately $500.

AC Repair Cost According To Unit Type

  • Window AC: $50 – $125.
  • Portable AC: $80 – $250.
  • Central Air: $100 – $500.
  • Swamp Cooler: $125 – $500.
  • Geothermal Air Conditioning: $200 – $700.
  • HVAC Package Unit: $300 – $500.
  • Ductless Mini Split: $750 – $900.

Is AC Condensate Water Toxic?

Yes, the water that comes out of your air conditioner is not safe for consumption. It contains byproducts of indoor air pollutants, such as mildew, fungal spores, chemicals, and more. Additionally, AC systems lack water treatment or purification features, further increasing the risk of contamination.

Using AC When Water Is Leaking

While it is safe to use your AC when water is leaking, prolonged use without addressing the issue can lead to further damage to the appliance, as well as potential damage to your walls and floors.

Preventing AC Water Leakage

To prevent AC water leakage in the future, consider the following measures:

  1. Ensure Proper Alignment: If you have a window unit, ensure the front is slightly higher than the back to allow water to flow outside.
  2. Regular Air Filter Cleaning: Clean air filters regularly, especially if they are in areas prone to dust and dirt.
  3. Unblock Drainage Hole: Check and clear any blockage in the drainage hole at the back of the AC unit.
  4. Monitor Cooling Coil: Keep an eye out for ice formation on the cooling coil.
  5. Refrigerant Levels: Ensure the AC has an adequate refrigerant level for efficient cooling.
  6. Professional Maintenance: Have your AC inspected by a professional regularly to identify and address potential issues promptly.

AC Lifespan And Signs Of Replacement

Quick And Easy Steps To Prevent Water Dripping From Your Split AC Unit

The lifespan of an AC unit varies depending on usage and maintenance. Modern units can last 15 to 20 years, while older ones may last 10 to 12 years. Consider replacing your AC if you notice the following signs:

  • Inadequate cooling.
  • Reduced airflow.
  • Excessive water pooling.
  • Noisy operation.
  • Non-functional thermostat.
  • Extensive age (10 to 15 years).
  • Frequent repairs.

Choosing The Right AC Unit

When replacing your AC, consider factors like your budget, the size of the space it will cool, your location’s climate, warranty, and energy efficiency to find the best fit for your needs.


Dealing with a split AC unit that’s dripping water can be a hassle, but with proper care and timely maintenance, you can prevent such issues. Regularly cleaning filters, inspecting your unit, and addressing any problems promptly will not only keep you cool but also save you money on repairs or replacements in the long run.

Quick And Easy Steps To Prevent Water Dripping From Your Split AC Unit

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Written by HVAC Contributor

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