Ceiling Drip with Error Code: Drain Pump Motor Failed

A ceiling unit drips with a drain code showing, above a finished ceiling. Establishing whether the pump is blocked or finished.

By Team Snowflake | Updated 24 Aug 2026

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

How this presents

An overflow from a concealed unit that has drained without trouble for years, with the pan full and no water leaving. The unit itself cools normally. Nothing in the room or the ceiling has been altered.

Setup: Daikin Ceiling-concealed13-15 yearsLandedBukit Timah
Misread as: Water damage that will keep recurring on equipment above a finished ceiling.
Check first: Whether the pump responds when the float is lifted by hand

What else produces this

An overflowing pan means water is arriving faster than it leaves, which on a pumped installation has a short list behind it. Either the pump is not being asked to run, or it is being asked and cannot. Lifting the float by hand while the supply is live separates those two in seconds. Where the pump stays silent under a live command, the fault is in the pump or its supply rather than in anything the water is doing.

A pan filling with water while nothing leaves confirms the removal side rather than the production side.
No response from the pump when the float is lifted by hand rules out the level switch.
Supply present at the pump terminals places the fault inside the pump itself.
Years of trouble-free service beforehand fit a component reaching the end of its life rather than a design problem.

Why it happens

Any pump of this kind runs every time the unit cools, which over years amounts to a great many hours for a small motor. Bearings wear and windings age exactly as they would in anything else, and eventually the motor stops. Where the drain relies on that pump entirely, the water has nowhere else to go, so a component failure immediately becomes a ceiling problem rather than an inconvenience.

What resolution involves

The pump is replaced, and the more useful question is asked at the same time: whether any part of this run could fall under gravity instead. A gravity drain has no motor, no switch and no supply, so it has no failure of this kind. Where the building allows it, removing the pump removes the fault permanently rather than resetting its clock.

How to tell it worked

Pour water into the pan and watch it away with the pump running, then check the pan again after a full cooling cycle. A pump that clears a poured litre may still be marginal under continuous production.

Before you approve a quote

A pump can fail. A fall cannot

Lift the float by hand with the supply live. Silence means the pump; running means the switch.
A pumped drain adds a motor, a switch and a supply to a system that otherwise has none.
Ask whether gravity is possible before replacing a pump. Removing it removes this fault for good.

Questions this case answers

Water dripping from the ceiling near a concealed aircon: what fails first?

What has failed is on the water-removal side rather than the cooling: either the pump is not being asked to run, or it is being asked and cannot. Lift the float by hand while the supply is live, and a silent pump points at the pump or its supply while a running one points at the level switch.

Can a drain pump be changed without tearing out the ceiling?

A replacement pump can be fitted, but the better question is whether the run could fall under gravity instead. Where the building offers a continuous fall to a drain point, removing the pump removes a motor, a switch and a supply from the system, and with them this fault.

What does A3 mean on a ceiling concealed Daikin?

A3 is the drain-side code: the unit was reporting that condensate was not leaving the pan. In this case the pan was full with no water leaving, and the pump motor had reached the end of its working life.

How do I know whether the pan or the pump is at fault?

Lift the float by hand while the power is on. A pump that runs points at the level switch or at what is obstructing it; one that stays silent points at the pump or its supply.

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

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