Ford F150 Pickup. Instruction - part 1680

Fig. 6: Identifying A/C Evaporator Core 
Courtesy of FORD MOTOR CO. 

The A/C evaporator core is the plate/fin type with a unique refrigerant flow path. 

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A mixture of refrigerant and oil enters the bottom of the A/C evaporator core through the A/C evaporator 
core inlet tube, is routed so it flows through the plate/fin sections, then moves out of the A/C evaporator 
core through the A/C evaporator core outlet tube.  

A/C Evaporator Core Orifice 

NOTE:

Installation of a new suction accumulator/drier is not required when repairing 
the air conditioning system except when there is physical evidence of system 
contamination from a failed A/C compressor or damage to the suction 
accumulator/drier.

 

2003 Ford Pickup F150 

2003 HVAC Air Conditioning - F150 Pickup

  

Fig. 7: Identifying A/C Evaporator Core Orifice 
Courtesy of FORD MOTOR CO. 

The A/C evaporator core orifice has the following characteristics: 

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It is located in the A/C evaporator core inlet tube.  

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It has filter screens located on the inlet and outlet ends of the tube body.  

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The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the A/C evaporator core 
orifice.  

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O-rings on the A/C evaporator core orifice prevent the high pressure liquid refrigerant from bypassing the 
A/C evaporator core orifice.  

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Adjustment or service cannot be made to the A/C evaporator core orifice assembly. A new evaporator 
core orifice must be installed.  

Suction Accumulator/Drier 

NOTE:

Installation of a new suction accumulator/drier is not required when repairing 
the air conditioning system except when there is physical evidence of system 
contamination from a failed A/C compressor or damage to the suction 
accumulator.

 

2003 Ford Pickup F150 

2003 HVAC Air Conditioning - F150 Pickup

  

Fig. 8: Identifying Suction Accumulator/Drier Components 
Courtesy of FORD MOTOR CO. 

NOTE:

Installation of a new suction accumulator is not required when repairing the air 

 

2003 Ford Pickup F150 

2003 HVAC Air Conditioning - F150 Pickup

  

An A/C evaporator core orifice or O-ring seal is not considered a major component, but a new A/C evaporator 
core orifice must be installed whenever a new A/C compressor is installed for lack of performance. 

The suction accumulator is mounted on the A/C accumulator bracket (19D606) to the right of the vehicle 
centerline. The inlet of the suction accumulator attaches directly to the A/C evaporator core outlet tube and the 
outlet tube of the suction accumulator attaches to the A/C manifold and tube. 

After entering the inlet of the suction accumulator, heavier oil-laden refrigerant contacts an internally mounted 
dome (which serves as an umbrella) and drips down onto the bottom of the canister. 

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A small diameter oil bleed hole, in the bottom of the vapor return tube, allows the accumulated heavier 
liquid refrigerant and oil mixture to re-enter the compressor suction line at a controlled rate.  

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As the heavier mixture passes through the small diameter liquid bleed hole, it has a second chance to 
vaporize and recirculate through the A/C compressor without causing compressor damage due to 
slugging.  

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A fine mesh screened filter fits tightly around the bottom of the vapor return tube to filter out refrigerant 
system contaminant particles.  

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A desiccant bag is mounted inside the canister to absorb any moisture which may be in the refrigerant 
system.  

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A fitting located on the top of the suction accumulator is used to attach the A/C cycling switch. A long-
travel Schrader-type valve stem core is installed in the fitting so that the A/C cycling switch can be 
removed without discharging the A/C system.  

A/C Cycling Switch 

conditioning system except when there is physical evidence of system 
contamination from a failed A/C compressor or damage to the suction 
accumulator.

 

2003 Ford Pickup F150 

2003 HVAC Air Conditioning - F150 Pickup