Is it bad to run AC with a leak?

Author: Devyn Kilback MD  |  Last update: Wednesday, February 18, 2026

Continuous operation of an AC with a refrigerant leak can contribute to air pollution, which can lead to a variety of health problems, including respiratory problems, heart disease and cancer.

Can I leave my AC on if its leaking?

Unfortunately, if you notice water leaking from your AC unit, turn it off until you can identify and solve the problem that caused the leak. Otherwise, you will likely be in for more expensive air conditioning repairs soon.

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.

Is it safe to use AC if water is leaking?

It's generally not advisable to turn on the AC if it is leaking. Here are a few reasons why: Water Damage: If the leak is from the AC unit itself, running it could exacerbate water damage to your home. Mold Growth: Continuous moisture can lead to mold growth, which can be harmful to your health and costly to remediate.

Can I stay in my house with a refrigerant leak?

Freon leaks can be hazardous. Direct exposure to AC refrigerant can cause health problems such as headaches, dizziness, and respiratory issues. If you suspect a refrigerant leak, it's crucial to ventilate the area and seek professional help from HVAC professionals to prevent further damage and health risks.

A/C Leak Testing Using Compressed Air, Soap and Water (any car)

Is it safe to run AC with a Freon leak?

The simple answer is, “Yes, but you absolutely should not do this.” If for any reason you suspect that your AC has a refrigerant leak, turn off the system and call for professionals to repair the leak and recharge the refrigerant to its factory-set level.

Is a refrigerant leak an emergency?

Many property owners ask themselves, “Are refrigerant leaks dangerous?” HVAC technicians treat refrigerant leaks as emergencies because inhaling Freon can cause severe health issues. The short-term symptoms of refrigerant exposure often include: Trouble breathing. Nausea and vomiting.

Is a leaking AC bad for your health?

Inhaling leaked refrigerant gases can lead to respiratory issues, such as difficulty breathing, chest tightness, and coughing. These symptoms can cause discomfort and distress, particularly for individuals with pre-existing respiratory conditions like asthma or COPD.

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.

Can you run AC if water is off?

ACs don't run on water. They're not connected to drain pipes or any part of your plumbing system. However, they need refrigerant to run. Refrigerant is a gas or liquid that has a low boiling point and absorbs the heat in your home.

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

Steps to Take If Your AC Is Leaking
  1. Turn Off the AC Unit. Before you start to look at your air conditioning unit, turn it off. ...
  2. Clean Up the Water. ...
  3. Determine the Cause of the Leak. ...
  4. Replace the Air Filter. ...
  5. Check Refrigerant Levels. ...
  6. Unclog or Replace the Drain Pan. ...
  7. Call an HVAC Professional.

Is an AC leak easy to fix?

If you hear dripping near the air conditioner or see moisture around the HVAC unit, the AC may be in need of air conditioner repair. Although most leaks are easy to fix, they are not always easy to find. Consequently, you may not know the leak is happening until you notice water damage on the floor or in the walls.

Why is my AC leaking but the drain is not clogged?

Condensate Pump Isn't Working

Some air conditioners need a condensate pump to efficiently drain the water. These pumps are needed when the home's drain system is placed above the AC unit. Even if the drain is unobstructed, water can collect in the pan and leak out if the condensate pump is not functioning.

What happens if my AC gets wet?

There are three primary ways your AC unit can degrade from rain: flooding, storm damage, and corrosion. Flooding: While a few inches of rain storms will be okay if your AC is muddled in deep-standing or flooded water above 15 inches, components can break down, and electrical wiring may become affected.

How to stop water leakage from AC indoor unit?

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 long can an AC leak?

How long does it take for freon to leak out of the system? Well, it depends on the size of the leak. For example, the tiniest leaks can take years to be noticeable. However, bigger leaks can empty a system within days.

Can I still run my AC if it's leaking?

Can I still use my AC if it's leaking water? If your AC is leaking water, definitely turn it off.

Who to call when AC is leaking water?

Turn off the system and check for blockages, or call an HVAC professional to inspect and fix the leak before using it again.

Is it OK if water comes out of the AC?

Water leaking from your AC unit isn't dangerous, but refrigerant leaks are. Exposure to refrigerant leaks for extended periods is poisonous to your body. Air conditioners use refrigerant to turn warm air into cool air.

Can a leaking AC cause a fire?

Improper handling: Refrigerants used in AC systems are often flammable. Leaks due to improper handling or maintenance can lead to fires or explosions.

Can AC leaking Freon make you sick?

One significant health risk is refrigerant poisoning. Inhaling Freon or other refrigerants, even in small amounts, can lead to headaches, dizziness, and nausea. Exposure to refrigerant fumes can quickly escalate to more severe health issues, such as loss of consciousness and even death.

Is the water from the AC drain harmful?

The water produced form the air conditioner is purely condensate water like that from a cold glass of ice tea on a hot summer day and is totally safe to use and harvest in a bucket outside of your home to water your plants.

What happens if you don't fix refrigerant leak?

Along with this, if a refrigerant leak is not fixed, it can lead to more serious damage to the system. It certainly won't resolve on its own. It could lead to much more costly and larger repairs of the air conditioning such as a frozen evaporator coil or short cycling.

What does Freon poisoning feel like?

According to WebMD, the symptoms of acute freon poisoning include: Sore throat and swelling in sinuses. Difficulty breathing. Coughing.

What is considered an HVAC emergency?

HVAC emergencies include system breakdowns, refrigerant leaks, gas leaks, electrical failures, or loss of heat/air conditioning during extreme weather. These issues can lead to discomfort, health risks, or property damage, requiring immediate professional attention.

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