Air cooler is the best option during the summer season. Apart from being less expensive as compared to air conditioners, air coolers are also cost effective. Room coolers come in different types suiting varied kinds of spaces. As far as their maintenance of air coolers is concerned, it can be either done by self or by taking help of technician specializing in servicing of air coolers. Persons opting for self-service option can take help of the following tips.