During the summer months can you even imagine a day without the air conditioner? Certainly not, because it is the AC that gives us the desired comfort during the sultry days. With time, air conditioners are constantly innovating in their technology, levels of power consumption and energy efficiency. In fact, it has been proved that newer models of ACs are more efficient than the older ones. They are more energy efficient, thus contributing to lower electric bills and also they emit a very less amount of greenhouse gas. But if you are already having an old air conditioner unit at home, before you think of replacing it with a new one, you need to find out how much does it cost to install a completely new AC unit. Before you take the plunge of getting a new AC unit you need to analyze carefully whether it is time for you to say goodbye to your old unit. In case, some parts of your old air conditioner are not functioning properly think of replacing that part. For example, in case the compressor of the air conditioner is malfunctioning you can think of replacing it with a new one. This way you can even save on your power consumption as well. In fact, comparing the cost of a new unit with the replacement of the compressor should be done in order to decipher which is a better option. But at the same time replacement of a part may hamper your warranty because there will be a mismatch of parts. Sometimes, even that hampers the functionality of the product.