Once you know what part you need you can then go ahead and buy it. This need not be difficult if you have a computer and Internet connection. There are many spare parts stores online; all you need is the name and model number of the part to order it and it will usually arrive on the doorstep within a few days.
The featured should be always kept dry for proper functioning of the machine. Since it is electronically connected, spraying of water and other greasy elements or soapy water results in the damage of the timer. Hence after the washing process, it should be kept clean and dry. Installation of a new one can be made with the help of an experienced service person. It helps in setting certain cycles in the movement of the washing machine and the knobs should be used with proper care.