It is always advisable to do the preventive maintenance of the air conditioner and check it at regular intervals. The regular maintenance of the air conditioner includes keeping the machine clean, preventing the occurrence of the leaks, keeping the insulation intact, checking for the proper working of the compressor, keeping cooling and condenser coils clean and most importantly keeping the air filter clean. It is always better to have annual maintenance contract of the air conditioner with expert professionals. Keeping the air conditioner free of the trouble helps greatly in saving electricity.