A/C System Flushing

Manufacturer recommends flushing contaminated system using one gallon of Ford A/C System Flushing Solvent (F4AZ-19579-A), Filter (FL-1A), A/C Flusher Fitting Kit (014-00992 or 219-00024) and A/C Flush/Purge Machine (014-00991 or 219-00022). DO NOT reuse flushing solvent and filter, they are intended to be used on one vehicle only.
Discharge A/C system, using approved refrigerant recovery/recycling equipment. Disconnect refrigerant lines from heat exchanger (condenser or evaporator) to be flushed. Using flush and purge fitting kit, connect A/C flush and purge machine to heat exchanger according to manufacturer instructions.
Circulate flushing solvent through heat exchanger in reverse direction of normal refrigerant flow (back-flushing). Flush component for a least 15 minutes. Stop flow of solvent. To remove solvent from heat exchanger, apply 90-125 psi (6.3-8.8 kg/cm² ) of compressed air to component for at least 30 minutes.
Compressed air is used to purge and evaporate all residual solvent from component. A/C system can be damaged if any solvent remains in system. Dispose of used flush solvent and filter in accordance with local, state and federal emissions statutes.
Using an A/C system filter is optional after system flushing is completed. However, if A/C system contamination is extensive, a filter kit is recommended after flushing. See A/C SYSTEM FILTERING .
After flushing is completed, install a NEW orifice tube if there has been a compressor failure or desiccant contamination. Install NEW refrigerant hoses if clogged with debris. Complete component installation, adding additional refrigerant oil as required. Evacuate, leak test and recharge A/C system and ensure proper operation.