Air Conditioning (A/C) System Flushing
Base Part Number: 19703
Activation
NOTICE: Use an A/C refrigerant analyzer before recovering any of the vehicle's refrigerant. Failure to do so puts the shop's bulk refrigerant at risk of contamination. If the vehicle's A/C refrigerant is contaminated, refer the customer to the service facility that carried out the last A/C service. If the customer wishes to pay the additional cost, use the A/C recovery equipment that is designated for recovering contaminated A/C refrigerant. All contaminated A/C refrigerant must be disposed of as hazardous waste. For all equipment, follow the equipment manufacturer procedures and instructions.
NOTICE: Before flushing the A/C system, remove the receiver drier or receiver drier element, front Thermostatic Expansion Valve (TXV) , rear TXV (if equipped) and hoses with mufflers. Internal plumbing of these devices makes it impossible to correctly remove any residual-flushing agent. These components are typically discarded after A/C system contamination. Hoses without mufflers can be reused unless they are clogged with foreign material. The 3.78L (1 gal) of Motorcraft® A/C System Flushing Solvent YN-23 and FL1-A filter used in A/C Flush and Purge Machine 357-405 80001 00 are intended for use on one vehicle only. They may be used to flush both the A/C condenser core and the A/C evaporator core on an individual vehicle, but under no circumstances should they be used on more than one vehicle.
NOTICE: Only the A/C Flush and Purge Machine 357-405 80001 00 and Motorcraft® A/C System Flushing Solvent are approved for use on Ford vehicles. No other flushing device or solvent is approved for flushing heat exchangers ( A/C condenser, A/C evaporator). Use of any other flusher or solvent may cause damage to the A/C system and the flushing unit.
NOTE: Prior to using the A/C Flush and Purge Machine 357-405 80001 00 for the first time, review the operating instructions.
NOTE: Never push shop air directly through an a/c system. Shop air is full of contaminants and must be run through flush machine to clean and dry air.
NOTE: Ford Motor Company has approved a procedure to provide technicians with a non-CFC method of flushing contaminated A/C system heat exchangers. The procedure allows the specific components to be cleaned and flushed. The types of contamination flushed include particle matter that results from A/C compressor or desiccant failure and gummy residue that can form when refrigerant oil is overheated during A/C compressor seizure. The flushing process is a 2-step procedure that involves using an A/C Flush and Purge Machine 357-405 80001 00 to:
circulate the flushing solvent through the heat exchanger in the reverse direction of normal refrigerant flow (back-flushing). Particulate matter picked up during flushing is filtered from the returning solvent before the solvent is returned to the reservoir for continued circulation.
remove the flushing solvent from the heat exchanger. In this step of the procedure, pressurized air 621-862 kPa (90-125 psi) connected to the flush machine is used to push and evaporate any remaining flush solvent from the heat exchanger.
1. Recover the refrigerant. Refer to: Air Conditioning (A/C) System Recovery, Evacuation and Charging (412-00 Climate Control System - General Information, General Procedures).
2. Disconnect the refrigerant lines from the heat exchanger(s) to be flushed.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.