The evaporator, the condenser and the compressor form the basis of all air conditioners. The evaporator is set inside the device, the rest outside.

What is the principle, the scheme of operation than engages all three parts? Successive heating and cooling of a volatile liquid (e.g. Freon) is the first step. Highly volatile liquid is compressed by compressor into a gas, which make the liquid cooler and produce heat. The heat is radiated by means of a fan. The next step is the condenser. The liquid enters the condenser, absorbs the heat from surroundings and reconverts into a gas.  Thus, the area becomes cool. The process is cyclical; it repeats over and over again making the room cool.

Others air conditioners parts are as follows: two fans (outside and inside), a hot coil dissipating heat (outside), a control circuit and a cold coil absorbing the heat (inside). The control circuit enables us to regulate the temperature, which is achieved through increasing or slowing the rotation speed of the fans.

The most important air conditioner part is, doubtlessly, the compressor. A good quality compressor is sure to be effective and last at least several years. Warranty is always offered for such air conditioner part, so if the old compressor proved worthless it is a good time to install a new one. The best thing to do, when it comes to changing the compressor, is to buy a compressor of the same manufacturer as the air conditioner. However, few companies manufacture compressors on their own. In most cases they purchase ready-made compressors.

Evaporator and condenser are also replaceable. Heating and cooling coils are to be replaced if their performance isn’t flawless.

Actually all air conditioner parts have some function in this complex mechanism. Dissatisfactory operation of a part may lead to improper operation of the other. That is why maintenance is important, especially in respect of the most significant parts.

As for less significant parts e.g. fans they are normally easier to remove. Anybody can remove a faulty fan from the air conditioner, only a screw driver is needed.

The rest parts of an air conditioner are outer cover, knobs and buttons. They are replaceable; what is more, these parts are available on market and are relatively cheap.