Aircon Leaking Water Inside the Room

Indoor dripping usually means one of three things: the drain is blocked, the coil is freezing and thawing, or condensation is traveling the wrong path. The leak pattern tells you which.

SAFETY WARNING

Stop using the unit and contact a technician if you notice water near sockets, plugs, or exposed wiring, breaker tripping while leakage is active, burning smell during leakage events, or water reaching sensitive equipment or appliances.

Drain-Path Blockage

Sludge, algae, or biofilm accumulates in the drain tray and pipe over months. Once the path narrows enough, water backs up past the tray lip and drips from the indoor unit casing.

Steady drip pattern during runtime.
Gurgling water sound near the indoor unit.
Cooling can still feel acceptable at first.

We clear and flush the drainage path, correct slope or insulation issues where needed, and retest under cooling load to confirm leaking stops. Gas work will not solve a pure drain obstruction pattern. Confirm drain behavior before approving unrelated scope.

Freeze-Thaw Cycle

When the evaporator coil drops below freezing — from a clogged filter, dirty coil, or low refrigerant — ice forms during operation, then melts in a rush that overwhelms the drain tray.

Leak appears in bursts, not a constant flow.
Cooling weakens before leakage worsens.
Icing signs may appear near the indoor area.

We remove the root restriction causing freeze-up, restore airflow or refrigerant balance as needed, and retest for stable operation without icing. Treating every leak as a simple drain issue can miss the freeze trigger and lead to repeat leakage.

Condensation Routing or Slope Issue

If the drain tray slope is wrong or pipe insulation has gaps, condensation travels along the trunking or wall instead of reaching the drain outlet. The drip point shifts depending on how much water accumulates.

Drip location shifts along trunking or wall path.
Leak timing changes with weather or runtime.
Moisture appears even when cooling output seems normal.

We clear and flush the drainage path, correct slope or insulation issues where needed, and retest under cooling load to confirm leaking stops. Replacing major components without confirming water-path behavior can add cost without solving recurrence.

Other Possible Causes

Water can travel from nearby wall or ceiling pathways and appear near the indoor unit, especially during monsoon periods. This can mimic an aircon leak even when the drain path is still functioning.

How to Tell

Water appears mostly after heavy rain, even with short runtime.
Leak marks spread along wall or ceiling lines before reaching the FCU area.
Moisture location shifts over time instead of staying at one fixed drip point.

If this is the case we will tell you on-site before recommending any aircon repair.

Help Us Diagnose Faster

Just observe, no disassembly required:

Leak pattern: steady drip / burst / light seepage
Timing: startup / mid-cycle / shutdown / after rain
Cooling trend: unchanged / weaker / unstable
Moisture location: under unit / trunking edge / wall line / ceiling line

Same situation with your aircon?

Describe what’s happening. We’ll work out the likely cause and tell you the right next step.

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