Condo dripping after renovation: fine dust choked the drain
A Paya Lebar condo unit started dripping after renovation works in the home. The timing pointed to dust entering the drain path, so the drain line was checked before quoting tray replacement or deeper aircon work.
By Team Snowflake | Reviewed 15 Jun 2026
Case summary
Panasonic Wall-mounted5 years oldCondoPaya Lebar, Singapore
- Concern
- Customer worried the indoor tray was damaged because water appeared after works ended.
- Found
- Fine renovation dust choking the drain path
- Key check
- Checked the drain line after renovation dust exposure
- Result
- The dripping stopped after the drain choke was cleared. The repair stayed small and tied directly to the renovation dust exposure. The customer had a clear follow-up trigger: recheck the drain path after dusty works, before boxing up access or installing furniture.
What we were told
The bedroom unit had not leaked before renovation. After painting and carpentry work, water began appearing at the trunking and lower casing. The customer had wiped the area dry, but the drip returned whenever the unit ran for a longer session.
What we checked
Because the leak started after dusty works, we did not begin with tray replacement. We checked whether water was being produced normally, whether the drain pan was cracked, and whether the drain path could clear water. The renovation context made fine dust and sludge the most likely early suspects.
The drain pan was intact at the visible leak area.
Water pooled instead of leaving the drain line smoothly.
Fine grey dust and sludge were present in the drain path.
The leak appeared after longer runtime, not immediately at start-up.
What we found
Fine renovation dust had entered the drain path and mixed with moisture to form a choke. The aircon was still producing condensate normally, but the water could not clear fast enough. Once the drain backed up, water escaped at the casing and trunking. The fault looked like a damaged indoor unit, but the actual issue was a blocked water route caused by post-renovation dust. The fact that the leak returned only after longer runtime also matched a slow drain restriction, not a tray that was open from the start.
What fixed it
We cleared the drain line, flushed the path, and checked that water flowed out consistently before closing the unit. The customer was advised to run and observe the aircon after dusty works rather than waiting until furniture is fully installed around the trunking. We did not recommend replacing the tray because the tray had not failed. We also suggested a post-renovation cleaning check before regular use, especially if sanding or carpentry dust was heavy.
Outcome
The dripping stopped after the drain choke was cleared. The repair stayed small and tied directly to the renovation dust exposure. The customer had a clear follow-up trigger: recheck the drain path after dusty works, before boxing up access or installing furniture.
What this case teaches us
Post-renovation drips need the drain path checked
- Fine renovation dust can mix with drain water and form a choke. The unit may be healthy but unable to clear condensate.
- A leak that starts after dusty works should be diagnosed from the drain path before tray or coil replacement is discussed.
- Tell the technician what was hacked, sanded, or painted nearby. That context changes the first inspection.
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