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Why There is Leaking Water Inside My Air Conditioner?



Here’s a common question we get during Malaysia's All Time Weather, “Why is my Aircond leaking water inside my home? There are multiple causes of this problem.

But first, turn your Aircond's thermostat to “Off” to prevent further damage to your home.

To understand why this is happening, you need to know how water forms on your Aircond in the first place.




Why does water form in my air conditioner?

Your Aircond's inside unit contains the evaporator coil that cools the warm air blown over it. This causes condensation (moisture) to form on the coil, just like how water droplets form on a cold glass of water on a hot day.

The moisture on the coil drips into a drain pan and down a condensate drain line (a white PVC pipe) that leads out your home.

So, with all that in mind, here are a few things that cause that water to leak into your home.


Reason 1: Clogged condensate drain line

A clogged condensate drain line is the most common cause of water leaking from your AC into your home.

If the drain line gets clogged with dust, dirt, sludge or mold, that water backs up into your home. In that case, you’ll need to unclog it. There are multiple unclogging methods, like using a wet/dry vac on the condensate line.

But the surefire way is to have a professional use a special vacuum to suck the blockage material out.


Reason 2: Damaged/rusted drain pan

Got an old air conditioner (12-15 years)? The drain pan may be damaged or rusted through, so water just falls right through. You’ll need to replace the pan.


Reason 3: Broken condensate pump

Is your furnace and indoor AC unit installed in the basement? If so then there is a condensate pump that pumps the water outside. But if the pump breaks, the water isn’t being pumped outside anymore. You will need to repair or replace the pump.


Reason 4: Dirty air filter

A dirty air filter blocks airflow over the evaporator coil. When that happens, the evaporator coil gets too cold and freezes over. When it melts, it drips an excess amount of water that the pan may not be able to handle.

Check your air filter to see if it’s dirty and change it if needed. You should be changing it every 1-3 months (depending on the season).


Reason 5: Low refrigerant

Similar to a dirty air filter, low refrigerant will lower pressure in the AC system, causing the evaporator coil to freeze over. When the coil melts, water overflows the drain pan.

You’ll notice you’re low on refrigerant when:

The air conditioner isn’t cooling well You hear a hissing or bubbling noise (indicating a refrigerant leak)

Depending on the severity of the refrigerant leak you’ll either repair the leak or replace the whole Aircond unit.


Need a professional?

Contact ISOTECH Today to repair your air conditioner.


Isotech Aircond provides award-winning air conditioning service within Klang Valley area, Malaysia. If you have any questions, talk to one of our experts for help.


#Isotech #AirCondServices #KualaLumpur #Selangor #Malaysia

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