The manual climate control system heats and/or cools the vehicle depending on the function selector switch position and the temperature selected. The function selector switch position determines heating or cooling and air distribution. The temperature control setting determines the air temperature. The heater blower motor switch varies the blower motor speed. Air Conditioning System Components Refrigeration System Components – 5.4L And 6.8L (7.3L Diesel Similar) Refrigeration System Components The A/C refrigerant system is a clutch cycling orifice tube type. The system components are: A/C compressor. A/C clutch. A/C condenser core. A/C evaporator core. Suction accumulator/drier. Connecting refrigerant lines. The refrigeration system operation is controlled by the following: A/C evaporator core orifice. A/C cycling switch. A/C pressure cut-off switch. The refrigerant system incorporates an A/C compressor controlled by an A/C cycling switch. The A/C cycling switch senses pressure in the suction accumulator/drier to control operation of the A/C compressor. An A/C compressor pressure relief valve is installed in the A/C manifold and tube to protect the compressor against excessively high refrigerant pressures. An A/C evaporator core orifice is installed to the condenser to evaporator tube to meter the liquid refrigerant into the A/C evaporator core.
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