Condensing temperatures often give service technicians valuable hints as to what the problem may be within a refrigeration system. In fact, most service technicians would rather troubleshoot the refrigeration system’s high side than the system’s low side. This is because almost all of the heat absorbed in the system is rejected in the condenser. All the heat absorbed in the evaporator and the suction line is rejected in the condenser. Also, the compressor’s motor heat and the heat generated in the compression stroke, often referred to as heat of compression, also has to be rejected in the condenser. The three functions of the condenser are desuperheating, condensation, and subcooling.