Is the original company responsible for fixing this?

Ideally yes — a service that leaves the unit in worse condition than before should be corrected by the company that did the work. In this case, we corrected it on the spot. If the original company isn't responsive, a second visit is usually the quickest resolution.

How do I know the blower is positioned correctly now?

Airflow should feel similar to what it was before the service, and the unit should run without unusual vibration or noise. If something still feels off after a correction, a follow-up inspection can confirm it.

Will this keep happening after future services?

Not if the reassembly is done carefully. The drain pan cover has clips that need to be seated until they click. It's worth checking before the technician leaves — just press along the front edge of the unit to confirm it's fully seated.

Worse after servicing traced to loose drain cover

Aircon case in Serangoon, Singapore: post-service issue traced to drain pan cover not reseated correctly after chemical wash after targeted diagnosis checks.

Case details

What client reported

The aircon was working fine before they came. After the chemical wash, it started dripping water and the cooling feels weaker than before. I called them back but they said everything was done correctly.

ProblemPost-service

UnitPanasonic · Wall-mounted · 5 years old

LocationHDB · Serangoon, Singapore

What we found

When symptoms appear immediately after a service, the most likely cause is something disturbed during the work. We inspected the indoor unit assembly before looking at anything else.

Water dripping from the front-bottom edge of the indoor unit — not from the drain pipe
Drain pan cover was not fully clipped back into position — one side was sitting loose
The gap allowed condensate to run forward instead of channelling to the drain pipe
Blower wheel was installed slightly off-centre, reducing airflow and contributing to weaker cooling

The drain pan cover hadn't been reseated properly after the chemical wash. This is a reassembly step that's easy to miss if the work is rushed. The loose cover created a path for water to escape forward. The blower wheel position also contributed to the reduced airflow.

What we did

Nothing was broken. We reseated the drain pan cover correctly, repositioned the blower wheel, and tested drainage. Both issues resolved without any parts or additional repair work.

Water dripping stopped immediately after the cover was reseated. Cooling returned to its pre-service strength once the blower was correctly positioned. No parts needed — just corrected reassembly.

Timeline

Day 1

Chemical wash completed — water dripping and weaker cooling noticed afterward

Same day

Inspected internal unit assembly for anything disturbed or unseated during service

Same day

Drain cover reseated and blower repositioned — water stopped, cooling restored

What we learned

What to check after a chemical wash.

Water dripping after servicing is usually a reassembly issue — drain pan cover, drain pipe, or housing not seated properly
Airflow drop after service can mean the blower wheel wasn't reinstalled correctly
Post-service problems have a cause — a second inspection usually finds it quickly

Common questions

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