Water dripping from the indoor unit can damage walls, floors and furniture. Here's what usually causes it and how to stop it.
Quick answer: An aircon leaks water indoors mainly because the condensate drain line is blocked (dust, mould or insects), dirty filters have caused the indoor coil to freeze and drip as it melts, the unit is not level, or it's low on gas, which also causes icing. Switch the unit off, clean the filters, and if it keeps leaking, have the drain cleared.
| Cause | Signs | Fix |
|---|---|---|
| Blocked drain line | Steady drip, water tray full, no water outside | Drain cleared during a service |
| Dirty filters | Weak airflow, ice on the coil | Wash the filters yourself |
| Low gas (leak) | Ice on pipes, poor cooling | Leak repair and regas by a technician |
| Unit not level | Water drips from one side | Re-level the indoor unit |
| Damaged drain pan or pipe insulation | Drips along the pipe or wall | Repair by a technician |
Our technicians come to you anywhere in Gauteng. The call-out is a flat R350 to diagnose the fault (waived if you go ahead with the repair), you get a fixed price before any work starts, and every repair has a 6-month guarantee.
A service once or twice a year, ideally before summer, clears the drain line, cleans the coil and checks the gas pressure. In dusty Highveld conditions, clean the filters every 2 to 4 weeks during heavy use.
If you see ice on the indoor coil or pipes, don't ignore it. It usually means poor airflow or low gas, and running the unit like that for long can damage the compressor.
Call or WhatsApp 072 686 0472. Every job starts with a flat R350 diagnostic call-out across Johannesburg, Pretoria and the East Rand.
By Absolute Repairs · Updated September 2026
Usually because the condensate drain line is blocked, or dirty filters have caused the coil to freeze and then drip as it melts. Cleaning the filters and clearing the drain normally fixes it.
Water near electrical parts and sockets can be a risk, and it can damage walls and floors. Switch the unit off and have it checked.
Once or twice a year for most homes, ideally before summer. Offices and units that run all day need servicing every 3 to 6 months.
Every aircon call-out starts with a flat R350 fee, which covers travel, diagnosis and a written quote. Clearing a blocked drain during a service is usually one of the simpler fixes.
Tell us your suburb, the brand and model, and the fault. Standard R350 diagnostic call-out.
📞 Call 072 686 0472 💬 WhatsApp UsOr email info@absoluterepairs.co.za
Tell us what's broken and where you are. We'll call you back to confirm a time, usually the same day.
Absolute