As with many other components in modern vehicles, your car air conditioning also has many parts, including gas levels, compressor oils, seals and condensers that require regular maintenance.
With normal use, it is common to lose up to 15% of the gas in the air conditioning system each year. This significantly reduces the performance of the air conditioning unit. A vehicle air conditioning unit running low on gas will have to work harder, using more fuel for the same output.
If you experience an unpleasant or bad odour in your vehicle, this can be due to the build-up of bacteria in the ducting and air vents inside your car. This can be resolved with regular service and treatment.