Air Conditioner Leaking Water in Merrimac
If your air conditioner is leaking water in Merrimac, it is almost always the drain line, filter or drip tray, not a major fault. Air Conditioning Merrimac finds the cause fast, stops the drip, and gets your system sorted properly, backed by 300+ five-star reviews.
What Water Leaking From Your Aircon Means
Water leaking from an indoor head usually means condensate is not draining away properly, rather than a serious mechanical failure. A blocked drain line, a choked filter, or a full drip tray are the usual culprits. Checking the filter is a sensible first step before anything else.

Common Causes of an Aircon Leaking Water in Merrimac Homes
A blocked or algae-filled drain line
Condensate lines grow algae and slime over time, especially in humid conditions, and eventually block completely. Once blocked, water backs up and drips from the indoor unit or stains the ceiling below.
A dirty or choked filter
A clogged filter can cause the coil to ice up. When the ice melts faster than the drain can clear it, water overflows the tray and drips into the room.
A poor install fall or shifted unit
If the indoor unit or the drain line was not installed with the correct fall, condensate pools instead of draining away. A unit that has shifted slightly over time can develop the same problem.
A full or cracked drip tray
Older units can develop a cracked or corroded drip tray that no longer holds condensate. Once it fails, every cooling cycle sends water straight onto the floor or wall below.
Can I Fix This Myself?
Clean the filter and check the unit sits level and secure on its bracket. Beyond that, clearing an algae-blocked drain line or resealing a drip tray needs a technician, since it usually means opening the unit properly.
- You can safely clean or replace the filter and check the unit has not shifted on its mounting
- Clearing an algae-blocked drain line or replacing a drip tray is a technician's job, not DIY
- If water keeps dripping after a clean filter, the drain line or tray needs proper attention
- Staining on the ceiling or wall below the unit means the leak has likely been running for some time

What To Check Right Now
Before you call, run through these safe checks. They help contain the damage and speed up our diagnosis:
- Turn the unit off and place a towel or container under the drip to protect flooring and ceilings.
- Clean or replace the filter, since a choked filter is a common trigger for drain overflow.
- Check the indoor unit still sits level and securely on its wall bracket.
- Check outside for water pooling near the outdoor unit or a blocked drain outlet.
- Call an ARC-certified technician (Lic #83326, ARC #L160535) if the leak continues.

When To Call an Aircon Technician for a Leaking Unit in Merrimac
- Water keeps dripping after you have cleaned the filter and checked the unit is level
- The ceiling or wall below the unit is stained or visibly damp
- Water is pooling on the floor every time the system runs
- The drip tray looks cracked, corroded, or is clearly overflowing
- The leak started suddenly alongside reduced cooling performance
Any of these at your Merrimac property is a job for an ARC-certified technician, not a temporary towel fix. We respond same-day where availability allows, with clear pricing before we start and no surprises. See our air conditioning repairs and air conditioning cleaning.

How it works
How We Fix an Aircon Leaking Water in Merrimac
Fault Finding
We trace the condensate path from the coil to the drain outlet to find exactly where the blockage, fall issue, or tray failure is happening.
Upfront Quote
Once we know the cause, we explain it in plain English and give you clear pricing before we start, so there are no surprises on the invoice.
The Clean or Repair
Depending on the fault, we clear and flush the drain line as part of an air conditioning clean, or repair the tray, bracket, or fall causing the leak.
Testing & Drainage Check
We run a full cooling cycle afterward and confirm condensate clears properly before we consider the leak fixed.
Why This Is Common in Merrimac Homes
Merrimac sits on the reclaimed Great Swamp floodplain, and the humid, low-lying conditions favour algae growth in condensate lines, so drains block up faster than in drier inland suburbs. Neighbouring Worongary sees similar drainage pressure.

Leaking Water and Related Aircon Faults Across Merrimac
An aircon that leaks water often shows up alongside icing up and a bad smell, and sometimes poor cooling. We fix all of these across Merrimac, Worongary, Broadbeach Waters, and the wider Gold Coast, including split system units.

Air Conditioner Leaking Water in Merrimac? Book a Technician Today
Call (07) 5661 9513 for same-day and emergency service with clear pricing before we start. Backed by 300+ five-star reviews and our workmanship guarantee, we will find the leak and get it sorted properly.
Get to know Air Conditioning Merrimac and everything else we repair, service and install locally.
Common questions
Air Conditioner Leaking Water FAQs
A leaking air conditioner is one of the most common calls we get on the Gold Coast. Here is what homeowners ask us most often about water dripping from their unit.
Why is my air conditioner leaking water inside?
It is almost always a blocked or algae-filled drain line, a dirty filter restricting airflow, or a full drip tray that can no longer clear condensate away.
What causes water to drip from an air conditioner?
A blocked condensate drain, a frozen coil that melts and overflows, a poor install fall, or a dirty filter icing up the coil are the most common causes.
Can I fix a leaking air conditioner myself?
You can safely clean or replace the filter and check the unit is level. Clearing the drain line and opening the unit is a job for a licensed technician.
Do I need a technician if my aircon is leaking water?
Yes, once the filter is clean and the leak continues. A blocked drain line or a poor install fall needs proper diagnosis and a lasting fix.
How much does it cost to fix an aircon that is leaking water?
It depends on the cause. We give clear pricing before we start, with options discussed with your technician on site, never a guess over the phone.
Does Merrimac's high water table make aircon drainage worse?
It can. Merrimac sits on the reclaimed Great Swamp floodplain, and humid, low-lying conditions make condensate drains more prone to algae blockages.