Saturday, February 4, 2012
1993 Bronco/Econoline/F-Series Evaporator Case Assembly Workshop Manual
Evaporator Case Assembly The evaporator case assembly is attached to the engine side of the dash panel. The case is a two-piece molded construction, one piece of which forms a cover over the evaporator core. An integral vacuum reservoir is part of the cover housing. This reservoir and the vacuum motor, which operates the outside/recirc air door, are linked through a check valve to a hose that supplies engine vacuum. The blower housing is an integral part of the evaporator case. It houses the blower motor and wheel assembly which attaches to the case through a mounting flange on the blower motor. The blower motor resistor assembly is attached to the case with its thermal elements extending into the air stream inside the evaporator case. The suction accumulator/drier is attached to the evaporator core by a support bracket.
Evaporator Case Assembly, Disassembled View Plenum Assembly The plenum assembly is mounted to the dash panel in the passenger compartment. It contains the heater core, temperature blend door, panel door and the floor/defrost door. The temperature blend door is cable-controlled through a cam located on top of the plenum. The panel and floor/defrost doors are both controlled by vacuum motors, located on the bottom of the plenum. The heater core is located in the plenum behind the heater core cover. The cover allows the core to be removed without removing the plenum. Plenum Assembly.
