Ceiling unit drip after quarterly service traced to loose drain joint
Aircon case in Dhoby Ghaut, Singapore: water leakage traced to drain connection at the unit outlet was left loose after quarterly service reassembly, allowing condensate to drip before reaching the drain line after targeted diagnosis checks.
Case details
What client reported
The unit was fine before the quarterly service. Within a few hours after the technician left, water started dripping onto the office carpet. The service company said the drain pan may have cracked during cleaning and quoted for a pan replacement.
What we found
A leak that appears right after servicing points to something handled during that visit. We checked the drain path from the pan outlet before inspecting the pan itself.
- Drain connection at the unit outlet was visibly loose — the joint had not been fully tightened after reassembly
- Water was dripping at the connection point, not from the pan surface or any crack
- After reconnecting and tightening the drain joint, water flowed through the drain line normally
- Drain pan surface was intact — no cracks, warping, or corrosion found on inspection
During the quarterly service, the drain connection was disconnected for cleaning access. When the unit was reassembled, the joint at the pan outlet was not fully tightened. Condensate collected in the pan as normal, but instead of flowing into the drain line, it leaked out at the loose joint and dripped onto the ceiling tile below.
What we did
GOOD NEWS — the drain pan was not damaged. The leak was caused by a loose drain joint left after reassembly. We reconnected and tested the drain flow to confirm the seal was secure. No parts were needed.
The drip stopped as soon as the drain joint was tightened. The ceiling unit continued operating with its original drain pan. No replacement parts, no ceiling work, and no further leaks.
Timeline
Day 1
Ceiling unit started dripping hours after quarterly service — told drain pan may be cracked
Day 1
Checked all drain connections at the unit outlet and found the joint was hand-loose, not seated and tightened
Day 1
Loose drain joint found and tightened — drip stopped, pan confirmed intact
What we learned
Post-service leaks — drain pan damage vs loose drain joint.
- The drain pan does not need to be cracked for a ceiling unit to drip. A loose joint at the pan outlet produces the same symptom. Inspecting the joint before condemning the pan prevents a costly misdiagnosis.
- Ceiling units require the drain connection to be disconnected during deep cleaning. If the joint is not properly tightened during reassembly, condensate leaks at the connection point instead of flowing into the drain line.
- A leak that starts within hours of a service visit almost always traces back to something disturbed during that visit. Checking recently handled connections first saves time and avoids unnecessary part replacement.
Best next step
If your unit is behaving similarly, start with the service path that fits this case before approving broader scope.
Common questions
Same situation with your aircon?
Describe it on WhatsApp