Rental-Flat Handover: One Overhaul, Two Lighter Cleanings

Three units, one package, three overhauls quoted. What deciding unit by unit does to the scope of a handover clean.

By Team Snowflake | Updated 26 Aug 2026

Teaching case based on recurring Snowflake service patterns; identifying details are combined.

How this presents

After a tenancy, a living-room unit taking longer to cool and moving less air, a spare room smelling damp when started after being shut up, and a main bedroom cooling normally. Earlier servicing notes group all three together and record nothing room by room.

Setup: Daikin Multi-split4-6 yearsHDBSengkang
Misread as: Three overhauls as one package, when only one unit shows buildup that justifies dismantling.
Check first: Each fan coil opened, run and recorded before any cleaning depth is chosen

What else produces this

Three casings that look identical can hide three conditions, so each gets run and opened before anything is priced. The sequence matters as much as the inspection: assessing them together invites the loudest symptom to set the scope for all three, and a damp smell in one room is not evidence about the coil in another. The shared outdoor unit is checked once the room pattern is clear.

A clean-looking filter with compacted buildup across the blower and behind the coil face is a unit whose surface tells you nothing.
Light surface dust with normal airflow, drainage, sound and cooling describes a unit needing routine work only.
A clear blower with film in the drain tray explains a damp smell without implicating the coil at all.
A shared outdoor unit supporting all three rooms normally keeps the decisions with the indoor units.

Why it happens

Rooms load their units differently and the casing hides it. Hours of use, whether a door stays shut, whether anyone was in the room at all across a tenancy: each of those changes what collects and where. One unit ends up with embedded buildup, another with surface dust, a third with a wet tray and nothing else. Grouping them prices the average and treats none of them correctly.

What resolution involves

Three different scopes, each naming the condition behind it: a dismantle and overhaul for the restricted unit, a routine service for the one that is simply dusty, and a targeted drain-tray clean for the smell. What makes that defensible later is the record. Room labels, before-and-after observations, and the work deliberately left out, so the next inspection compares like with like.

How to tell it worked

A line item per room, each naming what it found. A quote that prices the flat and not the rooms cannot be checked against anything at the next visit, which is when it matters.

Before you approve a quote

Identical casings, three different answers

Ask what each unit showed, not what the flat costs. Rooms load their units at completely different rates.
A clean filter is not a clean unit. What matters is what sits behind the coil face and across the blower.
A damp smell in one room is evidence about that room's drain tray, and about nothing else in the flat.

Questions this case answers

Do all my aircon units need a chemical overhaul at the same time?

Almost never at the same time. Rooms differ by hours of use, by whether the door stays shut, and by whether anyone was in them. Those differences put embedded buildup in one unit and surface dust in another, and a single package price hides which is which.

Why does one room smell damp when the aircon starts?

The reason is usually a film in the drain tray rather than anything on the coil. A tray that stays wet through long idle periods grows a layer that smells on start-up, and the blower and fins can be perfectly clear. It is a targeted clean rather than a dismantle.

My filter looks clean, so does the unit still need servicing?

It can, and the filter is the wrong place to look. A filter catches what is in front of it while the deposit that restricts airflow sits behind the coil face and across the blower. A unit with a spotless filter and compacted buildup underneath is the ordinary case.

What should a landlord get in writing before a tenancy handover?

A record per room rather than per property: what each unit showed, what was done, and what was deliberately left alone. Without the room labels, the next inspection has nothing to compare against and the same package gets sold again.

Ready to get started?

Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.

WhatsApp us