AC condensation leaks for duplexes in Al Aard, Riyadh

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

Before we start: what we know about Al Aard

The centre of Al Aard is at 24.8935, 46.6060, about 21.2 km from the centre of Riyadh, with an approximate radius of 8 km. The service-area circle on the map below is drawn from this point. The centre of Al Aard sits about 671 m above sea level (SRTM open elevation data).

The nearest wadi channel is about 1 km from the centre of Al Aard (OpenStreetMap). Main roads in or near Al Aard: King Fahd Road, King Abdulaziz Road, Abu Bakr Al Siddiq Road.

Why does my duplex in Al Aard keep dripping water from the air conditioner? Most owners here ask this once the summer heat settles in and the drip tray starts overflowing. Al Aard sits at about 24.8935, 46.6060, roughly 21.2 km from the centre of Riyadh, and the area covers an approximate radius of 8 km. The centre of Al Aard sits about 671 m above sea level, so the air here is drier and hotter than in many coastal cities, which pushes indoor units to run longer and produce more condensate. The nearest wadi channel lies about 1 km from the centre of Al Aard, and dust carried by seasonal flows can clog drain lines and tray outlets, adding to the overflow problem on duplex units that share a stairwell or rooftop layout.

When a technician visits, the inspection usually follows a clear sequence. First, the drain line is traced from the indoor unit to its outlet to check for sags, kinks, or places where the line has been run uphill, since any of these stop water from flowing away. Next, the drip tray and the evaporator coil are checked for dust, algae, and debris that block the outflow. The condensate pump, where fitted, is tested to confirm it switches on when the tray fills. The technician then reviews the airflow through the filter and the indoor coil, because a dirty filter can cause the coil to freeze and then thaw in heavy runs of water. Finally, the outdoor drain and any shared rooftop or balcony routes are looked at, especially in duplexes where two units drain near each other.

Before the visit, gather a few details that speed up the work. Note which floor and room each unit serves, how long the drip has been happening, and whether it worsens at night or during peak afternoon heat. Clear the area beneath each indoor unit so the technician can reach the tray and drain line, and make sure the building access and rooftop or balcony door are open at the agreed time. If you have previous service records or any earlier repairs to the drain line, keep them handy. Where tank cleaning or internal coating is part of the wider maintenance plan for the property, note that the coating is priced at SAR 25–65 per m², which can be useful to know when comparing overall upkeep costs.

In a duplex, the two floors often share lines, so tests are done floor by floor.

When do you need AC condensation leaks?

The following signs are worth checking before they grow:

• A wet spot under the indoor AC unit
• Drips from the air outlet
• Damp along the wall where the drain line runs

Causes we see in the field

• A drain line without enough fall — we check this before anything else.
• A blocked condensate drain line — we check this before anything else.
• Condensation on uninsulated pipes — we check this before anything else.

Tools and methods, and when we use them

From the first visit to the report

1. Ruling out the water network: We confirm the moisture is not from a supply pipe.
2. Tracing the drain line: The condensate line is followed and flushed where it is blocked.
3. Recommendation: Drain cleaning, re-sloping or pipe insulation, as the readings show.

Al Aard in facts and sources

Short answers for Al Aard

Common mistakes we see

• Searching for a pipe leak when the source is condensation

The written outputs

You receive: whether the moisture comes from the AC or from the water network, in a technical report with a verification code.