On a hot day, I start my car and switch on the A/C unit; the air from the A/C unit is not cold. Why?

The internal cabin temperature of the car, having parked under the hot sun, can get very high. When the A/C is turned on, it will take some time for the cabin air to be cooled down. The process of heat exchange in taking place during this time cool air in the cabin will be experienced. Alternatively,  you may wish to wind down the windows, during this time to release the hot air from the cabin.

Do I need to service the air-con?

As to every vehicle on the road, regular check and service of the A/C is necessary, especially in high humid country. A/C System should be service to ensure proper system performance.

Why and when should the system be flushed?

Whenever a major leakage or parts failure and the A/C System are opened for service, it is good to flush the system. When parts have failure, debris can be found in the system, these have to be removed. Flushing the A/C System to clean the system will ensure these substantial amounts of debris will be removed.

Do I need to change my receiver drier?

The desiccants in the receiver drier are used to trap system moisture. Moisture in the system can lead to corrosion. The desiccants need to be replaced whenever a system is opened for major repair. The filter in the drier trapped minor debris and should be replaced when the system is flushed.

What are the causes of leakages in my A/C?

Leakage in the system should be reduced to the minimum. Leakage usually occurs in joint parts. Another source of leakage can be due to corrosion of heat exchanger that allows the R134a gas to escape.