Why is my AC dripping water inside the room?

Author: Prof. Cordell Kuhlman  |  Last update: Saturday, March 1, 2025

One of the most common causes of leakage is clogged drainage. The culprit can be dirt, dust, and fungus that block the water to flow. The water will try to find the other way out, causing the AC to leak. If you let this problem sit for too long, this may cause a breathing problem.

How do I stop my AC unit from leaking water inside?

To prevent an air conditioner from leaking water inside and outside its case, ensure regular maintenance, including cleaning or replacing the air filter and clearing the condensate drain line to avoid blockages. Check for proper installation with a slight tilt towards the outside to allow proper drainage.

How to fix water dripping from AC indoor unit?

To fix water dripping from the split AC indoor unit, start by cleaning the drain line to remove blockages. Replace or clean the air filters to ensure proper airflow. Check for refrigerant leaks and refill if necessary. Regular maintenance can prevent AC indoor unit water leakage and ensure optimal performance.

Why does AC drop water inside?

Water dripping from an air conditioner is typically due to condensation from the cooling process. However, excess leakage could indicate issues like a clogged drain line, improper installation, dirty air filters, refrigerant leaks, or damaged drain lines.

Should I turn off my AC if it's leaking water?

You should shut off your air conditioner immediately if you see any signs of leakage. If there is excessive moisture inside your home, it could cause serious health problems. Mould growth can cause respiratory issues, headaches, nausea, and even asthma attacks. If you see any leaks, call an HVAC technician right away.

Fix AC Leaking Water Inside the House in 10 Seconds | Air Conditioner Maintenance Tips

How long can I run my AC if it is leaking water?

As soon as you notice that your air conditioner is leaking, go ahead and turn it off. This is important even if the air in your home doesn't feel any different, because it will stop the flow of water. The more water leaks out of your air conditioner, the more susceptible it becomes to further damage.

How to unclog a condensate drain?

To unclog an AC drain line, turn off the power to the unit. Locate the drain line and use a wet/dry vacuum to suck out the clog. Flush the line with water using a garden hose or cup of water. Check and clean the drain pan under the indoor unit.

How do I fix my AC water drop?

Resolution
  1. Increase the temperature. It is generally recommended to set it to 26°C.
  2. Run the Dry mode for 3-4 hours, then switch to the Cooling mode (check the inflow of external air/humidity).
  3. Set the cooling fan speed to 'Med' or 'High'.
  4. Adjust the blade angle.

How to tell if AC is leaking, refrigerant or water?

Water is leaking from your AC unit: Water leaking from your AC unit can be a sign that it has stopped running and the frozen condensation from the evaporator coils is melting. You hear hissing or bubbling sounds: Refrigerant leaks through small holes or cracks in the coils of your AC.

How to stop water dripping from an AC vent?

If the cause of the dripping is condensation, you can insulate the air ducts to prevent warm air from meeting cold air. If the cause of the dripping is a clogged condensate drain line, you can clear the clog with a wire, wet vac, or by pouring a water/vinegar solution in the pipes.

How to fix air conditioner leaking water inside from wall?

Is Your Wall or Window AC Leaking Water Inside? How to Fix It
  1. Tilt the Air Conditioner from Front to Back. Wall and window AC units drip water out of the back due to condensation from the evaporator coils. ...
  2. Clear the Hole in the Drip Pan. ...
  3. Use a Pan Tablet. ...
  4. Clean the Air Conditioner. ...
  5. If All Else Fails, Hire an AC Repair Pro.

How to remove moisture from AC indoor unit?

If the air-conditioner has been in use, it will have moisture and probably also water in it. Before you begin the cleaning process of your AC, it is essential to dry it. Set the air-conditioner on 'Fan Mode' and run it for 30-40 minutes as this will help the moisture evaporate.

Why do I hear water dripping in my AC unit?

If you hear dripping, it likely means that something is wrong. Either the AC unit is having trouble operating properly, or the drip pan drain is clogged. Either way, it is important to have your unit inspected by a trained NATE certified technician that can diagnose and solve the problem.

Why is my AC leaking water in my room?

A clogged condensate drain line is one of the most common causes of air conditioner water leakage. Over time, this line can become clogged with algae, dirt, dust, and debris. When this happens, the line backs up and overflows from the drain pan, causing the water to leak into your home.

How to check condensate drain?

Turn off the power to the air conditioner. Remove the access panel and inspect the overflow pan. Use a flashlight to inspect the drain pan and the overflow drain pan. Note any cracks, dents, holes, rust, and mold or algae build-up.

How much does it cost to repair a leak in the AC unit?

If you simply need a top off of refrigerant, you can expect to pay anywhere from $160-$375. If you need a repair for the leak itself, you can anticipate a higher bill. For refrigerant leak detection and air conditioning repair you may pay anywhere from $550 to $1,600.

Is it OK if my AC is dripping water?

As we've explained, that dripping water is a byproduct of your malfunctioning AC. To prevent more water damage, shut the whole system down. Second, clean up the leaked water. You may need a shop vac.

Can you stay in a house with a Freon leak?

Can you stay in a house with a Freon leak? While a small leak in your AC unit may not pose an immediate danger, it's essential to address the issue promptly. Leaking refrigerant can lead to inefficient cooling and higher utility bills, and prolonged exposure might cause health issues.

Is AC leaking water an emergency?

A leak from your air conditioner can cause significant damage to the system. Whether there's more moisture on or near your AC than usual or water is ponding near the drain line, consider it an emergency. The damage from water can quickly escalate and spread to nearby equipment, materials, and furnishings.

Is it normal to drop water from an AC indoor unit?

The water droplets inside the air conditioner are caused by temperature differences depending on the local weather and are normal. However, if the leakage is severe, an engineer's inspection is required.

How do I unclog my AC drain line?

How to Unclog Your AC Drain Lines in 9 Steps
  1. Turn Off Your Air Conditioner. ...
  2. Locate the Drain Line Pipe. ...
  3. Remove the Cap From the Pipe. ...
  4. Inspect the Drain Line Pipe. ...
  5. Unclog the Drain Line Pipe. ...
  6. Pour in Vinegar. ...
  7. Use a Wet/Dry Vacuum Cleaner. ...
  8. Reconnect the Cap to the Drain Line Pipe.

How much water should an AC drip?

It's completely normal for your AC to drain 5-20 gallons of water outside of your home (via the condensate drain).

Why is my AC condensate drain line constantly dripping?

This can happen from build-up in the line, mold growth, and mildew. Pressure can build up in the line and cause it to split. Blockages can also contribute to backup, which would then cause your drain pan to overflow.

How much does it cost to unclog an AC drain line?

Flush Condensate Drain Line

The repair cost to have the drain line flushed runs between $75 to $250.

How often should I put bleach in my AC drain?

Using Bleach in Your AC Drain

Be sure to use a minimum of 2 cups once or twice per year. Be advised, however, that some newer units no longer recommend bleach or vinegar due to oxidation/degradation concerns. In these cases, boiling water is recommended.

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