A/C System Flushing

WARNING: DUE TO REFRIGERANT HAZARDS, ALWAYS WEAR SAFETY GOGGLES AND NON-PENETRABLE GLOVES WHEN WORKING ON OR FLUSHING A/C SYSTEMS.

1. Perform all A/C system diagnostics.
2. Recover the refrigerant from the A/C system. Refer to the procedure using a U.L./E.P.A. approved recovery/recycling device. Follow the recovery procedure specified by the equipment manufacturer. Refrigerant Recovery
3. Disconnect the A/C hoses from the heat exchangers (A/C evaporator core and A/C condenser core) to be flushed.
4. Remove A/C evaporator core orifices, thermal expansion valve, suction accumulator/drier, receiver/drier, and/or mufflers which may be attached to the heat exchangers (A/C evaporator core/A/C condenser core) being flushed.

CAUTION: Suction accumulator/driers, receiver/driers, A/C evaporator core orifices, thermal expansion valves, hoses, and mufflers should be removed. Do not flush these components. Internal plumbing and material makeup of these components makes it impossible to properly remove debris and/or residual flushing solvent. Except for the hoses, these components are typically discarded after A/C system contamination. Hoses can typically be reused unless they are clogged with debris.

5. Clean all dirt and debris from the fittings on the heat exchanger to be flushed.
6. Select the proper fittings, clean and lubricate connections, and securely attach to the heat exchanger. O-rings must be used with these fittings to ensure proper, leak free connections.
7. If the A/C evaporator core is being flushed, connect the flusher outlet hose to the suction fitting on the A/C evaporator core. This fitting is normally connected to the suction accumulator/drier. Connect the return hose to the other fitting.

If the A/C condenser core is being flushed, connect the flusher outlet hose to the liquid side fitting of the A/C condenser core. This fitting is normally connected by hose to the evaporator core. Connect the return hose to the other fitting.

NOTE: All flushing/purging will be performed in the direction opposite the normal flow of refrigerant in an operating A/C system

8. Fill the fluid reservoir with 3.8 L (1.0 gallon) of Ford A/C System Flushing Solvent F4AZ-19579-A or equivalent.

CAUTION: This Rotunda A/C Tool Flusher 014-00991 is intended for use with only Ford A/C Flushing Solvent F4AZ-19579-A or equivalent. Use of any other flushing solvent or agent may cause damage to the flusher. Substitute solvents or agents may not be removed during the purging process and may leave residues which can damage A/C system components.

9. Connect static ground strap to vehicle.






10. Make sure the purge air supply valve is released from its locked-on position. Place valve #1 in PURGE position. Attach the shop air supply to the flush quick coupler.
11. Slowly turn valve #1 to FLUSH position.
12. Observe for flush solvent flow through the outlet hose.
13. Operate the pump for a minimum of 15 minutes to flush all debris and dissolve any gummy oil residues which may be present in the component being flushed.

NOTE: If the pump stalls during operation, remove air hose immediately. Pump stalling may occur as a result of large particles of debris. To dislodge debris which impedes pump operation, connect air hose to purge quick coupler, gradually depress the purge air hose valve to force debris and flush solvent back into the reservoir. Reconnect air hose to flush quick coupler and observe for flow.

14. Return valve #1 to PURGE position for 1 minute.
15. Disconnect air hose from flush quick coupler.
16. Attach air hose to purge quick coupler. Gradually engage the air purge valve to full flow for approximately one minute to remove the majority of the flushing agent from the heat exchanger being flushed.
17. Stop all purge air flow by releasing the air purge valve lever.
18. Place valve #2 in PURGE position.






19. Gradually engage the purge air supply valve and lock in the full flow position.
20. Allow the system air purge to continue for a minimum of 30 minutes.

CAUTION: Failure to continue air purge for the entire 30 minutes as specified may result in residual amounts of flush solvent contaminating the A/C system. Residual flush solvent in a functioning A/C system may lead to A/C system failure. The manufacturer of this flusher and the specified flushing solvent accept no responsibility for damages caused by misuse of, or failure to follow this procedure in its entirety as specified.

21. Periodically, during the 30 minutes air purge, check the moisture trap on the outlet side of the flusher and drain any water buildup using the petcock on the bottom of the moisture trap.
22. After completion of the 30 minutes air purge, release the purge air supply valve to stop all air flow.
23. Disconnect the air hose from the flusher.
24. Disconnect the flusher hoses from the flushed heat exchanger.
25. Disconnect static ground strap. Move the flusher away from the vehicle.
26. Disconnect flusher fittings from the heat exchanger and retain for future use.
27. If the remaining A/C heat exchanger in the vehicle is to be flushed, repeat steps 1-28.
28. Drain the flushing solvent from the flusher reservoir and replace filter. If filter becomes overtightened, use Oil Filter Wrench D79L-6731-B or equivalent to remove it.

CAUTION: The gallon of Ford A/C Flushing Solvent F4AZ-19579-A, and Filter FL-1A used in this flusher are intended for use on one vehicle only. They may be used to flush both heat exchangers on an individual vehicle, but under no circumstances should they be used on more than one vehicle. Residual contamination may contaminate other vehicles, causing possible damage to A/C system components.

29. Dispose of the drained flushing solvent and filter in accordance with federal, state, and local regulations.