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We built a free scorecard that shows how your heat pump, ventilation and solar systems are performing. Results are usually surprising.
No thanksWe built a free scorecard that shows how your heat pump, ventilation and solar systems are performing. Results are usually surprising.
No thanks
Short answer: it's almost always a blocked condensate drain line, not a broken unit.
Water dripping or leaking from an indoor air conditioner unit is one of the most common call-outs in Auckland homes. It looks alarming, but in most cases it traces back to one specific, low-cost cause.
An air conditioner removes moisture from the air as it cools a room. That moisture collects in a drain pan and exits through a condensate drain line, usually running outside or into a wastewater point.
Over time, algae, dust, and debris build up inside that line. Eventually it blocks partially or completely. When it does, moisture backs up in the drain pan, overflows, and runs down the wall or drips from the front of the indoor unit. The unit itself hasn't failed. The drainage path has.
In Auckland's humid climate, this happens faster than in drier regions, since the unit is removing more moisture from the air on average and the drain line has more to carry.
A dirty air filter. A blocked filter restricts airflow across the coil. The coil can ice over, and when it melts, it produces more condensation than the drain pan is designed to handle at once.
An incorrectly angled unit. If the indoor unit isn't level, or has shifted slightly since installation, the drain pan doesn't sit at the angle it needs to drain properly.
A cracked or damaged drain pan. Less common, but possible in older units. This one does need a repair, not a clean.
Switch the unit off and get it looked at sooner rather than later if you notice ice forming on the indoor or outdoor unit alongside the leak, if water is reaching electrical fittings or a ceiling cavity, or if the leak has appeared suddenly and heavily rather than as a slow drip. These point toward something beyond a routine drain clear.
Most leaks resolve with a drain line clear and a filter and coil clean, the same components covered in a standard air conditioner service. If the leak persists after a clean, or you're seeing ice, electrical involvement, or a sudden heavy leak, that points toward a genuine fault rather than a maintenance issue. See air conditioner repair Auckland for what a professional diagnosis covers.
Almost always a blocked condensate drain line. Algae and debris build up over time, moisture backs up in the drain pan, and it overflows down the wall or drips from the unit. A drain line clear resolves it in most cases.
For a slow drip with no ice and no electrical contact, it's generally safe to keep running while you book a service. If you see ice on the unit, water reaching wiring or a ceiling cavity, or a sudden heavy leak, switch it off and get it assessed.
Some homeowners clear the external end of the drain line themselves with care, but the internal drain pan, coil, and connection points need proper access and cleaning tools most homeowners don't have. A professional service clears the full path, not just the visible end.
Yes, over time. Repeated overflow can damage wall linings, flooring, and in ducted systems, ceiling cavities. It's one of the more avoidable causes of water damage in Auckland homes, and it's cheaper to address early.