Aircon Problems

Cooling complaints are the most common aircon issue in Singapore. The unit runs, the fan blows, but the air is not cold — or it starts cold and turns warm after 10 to 15 minutes. In a tropical climate where outdoor temperatures regularly exceed 32 degrees, even a small drop in cooling performance is immediately noticeable.

Water leaks from an aircon indoor unit are the second most common complaint in Singapore. The unit produces condensation naturally — moisture from humid indoor air collects on the evaporator coil and drains away through a pipe. When that drainage path is blocked, water backs up and drips from the unit or tray.

Aircon systems are not silent, but a sudden change in sound usually signals something specific. A new clicking noise, a gurgling from the indoor unit, a rattle from the outdoor unit — each points to a different component and a different level of urgency.

Power and electrical issues range from minor (dead remote batteries, tripped isolator) to serious (compressor failure, wiring fault). Before assuming the worst, check the basics: is the isolator switch on? Is the circuit breaker tripped? Has the remote run out of batteries? These account for a surprising number of service calls.

A musty or sour smell when the aircon starts is the most common air quality complaint. It usually means mould or bacteria have colonised the evaporator coil or drain tray — Singapore's humidity makes this almost inevitable without regular cleaning. The smell is strongest at startup because stale moisture from the last cycle gets blown into the room.

Control and airflow problems are often the easiest to diagnose because the signs are specific and visible. The remote does not work, the fan speed will not change, the louvre is stuck in one position, or no air comes out at all. Each points to a different component — remote sensor, PCB, fan motor, or louvre motor.