The operation of an air conditioner demands some energy. However, when they malfunction, it may be a tremendous pain. It may be due to a leak or some other causes.

But a leak in an AC unit can occur for various reasons like clogged condensate drain, damaged drain pan, faulty installation, dirty air filter, etc. It's also crucial to know whether you may fix an AC unit leak or whether professional assistance is needed.

You can also check our guide on How to check freon in a home air conditioner?

What Causes My Portable Air Conditioner Blowing Out Water?

What Causes My Portable Air Conditioner Blowing Out Water

Here is a list of the most common reasons that trigger a portable air conditioner to blow out water. These are:

Faulty Blower

An ineffective or failed blower could cause ice formation on the evaporator coil. The AC will have too much water in the evaporator and blower chamber as this ice melts. As a result, the ice melting may cause your portable AC to spit out some water.

Furthermore, the evaporator's heat exchange is hampered by an inaccurate or sluggish blower. The evaporator's ability to chill the warm air is slowed and constrained by the AC's inadequate airflow. As a result, the evaporator coil may freeze, which could cause ice and spitting.

Dirty Air Filter

Dirty filters impact an AC unit's whole performance. It may limit airflow and result in frozen coils. When it defrosts, the extra water spills into the drain pan, resulting in a water leak. The device's efficiency and lifespan are enhanced by routine filter replacement and cleaning.

It is suggested that AC filters be cleaned regularly every two weeks or more in areas with greater dust accumulation. So, no need to use any abrasive cleaning chemicals; a basic cleaning with soap and water and a soft towel should work just fine. Once each month for flat filters and every three months for pleated ones, respectively.

Bad Installation

A poor installation results in an unlevel AC unit's positioning and angular orientation. Installing an AC unit correctly involves placing it at least 3–4 feet up from the ground, on a level surface, or slightly tilted outwards. The device's front end can be tilted not more than half an inch so that condensed water will drain out the back end.

A bad Installation may result in air duct leaks, poor airflow, and compressor damage. Water leaks, inadequate cooling, and electrical issues are common indicators of a poorly installed unit.

Lack Of Refrigerant

If your portable air conditioner's heat exchanger and filter are both clean, it should be able to provide enough airflow to keep the room cool. The air conditioner lacks sufficient refrigerant if the room isn't cool and water is dripping from the air vent.

If that is the scenario, you will require an expert to address the issue and get it back in working order. A qualified AC expert will find the leak, fix it, and stimulate the system's refrigerant levels.

Drain Blockage

Small amounts of water in the drain pan are common; however, a blocked drain line is most likely to blame when it is overfilled or contains standing water. Dust and debris in the air blowing into the coils may mix with the water dripping down the drain line.

Grime buildup can block the drain and cause backflow through the drainage system, which brings water blowing out from the ducts.

Cracks Or Fractures

Cracks or fractures in the air conditioner could cause water leaks. Portable air conditioners are met with an accident while being transported, or if they freeze up, cracks may form.

Look for cracks in the condenser and condensate pan. The temperatures in these two regions can change dramatically. If your air conditioner has cracks, fill them with resin poly sealant.

Cold Weather

Evaporator coils may freeze if you run your air conditioner at 62° F (16° C). As air conditioners are not designed to be operated in the winter, then this will result in water blowing from your AC unit.

What To Do If A Portable Air Conditioner Blows Out Water?

What To Do If A Portable Air Conditioner Blows Out Water

If you notice water leaking, switch off your air conditioner, disconnect it, give it a moment to rest, then turn the breaker off. Continued use could harm the compressor and other parts, so stop using it immediately. When an AC system starts to run poorly, you can safely perform a simple filter and drain line cleaning.

If cleaning doesn't resolve the issue, a qualified maintenance crew may be needed to evaluate the situation. They will do a full check, carefully clean the filters, make necessary adjustments, and guarantee everything is installed correctly.

For maintenance, it is advised to change filters routinely, clear clogged drains, and have an expert AC unit serviced at least once a year.


Are portable air conditioners susceptible to mold growth?

The evaporator coils, air filters, and drain lines are the components of your portable air conditioner most susceptible to mold and mildew growth. As soon as bacteria invade the device, they begin to spread. The mold will force the portable AC to begin to smell eventually.

Can we run the AC while the water is leaking?

You should be able to continue using it, considering that the obstruction or dirt accumulation is what's causing the leak. Put a bucket beneath the dripping AC unit, and keep an eye out for any more indicators of harm to your AC.

Is it hazardous to sleep with the air conditioning on?

Dehydration is one physical problem that might arise from sleeping with an air conditioner. As the air conditioner not only cools the air but also dehumidifies it, leaving it on all night can cause dryness in your mouth, skin, throat, and nose.

See our blog: How much does it cost to run air conditioning?

Final Thoughts

The most popular reason for water leaks and water blowing from AC units include filthy filters, clogged drain lines, cracks, improper installation, etc. You can safely perform DIY filter cleaning without endangering the device.

But, if you cannot fix the issues, then contacting expert assistance will be the right course of action. Your air conditioner's lifespan will be increased by routine filter cleaning and regular professional maintenance.

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