When the warm air passes through the filter and over the cooling coil where it gives up its sensible and latent heats to the refrigerant circulating through the system. This gas is pumped into the condenser through compressor. In the compressor, with pressure of gas refrigerant, the temperature is raised to a higher value than the temperature of outdoor condenser. The vapour gives up the heat to condense and change into the liquid. Thus, this cycle is repeated.