"The most comprehensive source for Automotive Tools & Equipment" Make Flushing Part of Your Regular A/C Service You know that not all A/C jobs are simple recharges - there are times when you need to flush a vehicle's air conditioning system to ensure that it operates satisfactorily. These circumstances fall into three categories: Routine Maintenance: As an air conditioning system ages, oil, sludge, and particulate build up, plug screens, expansion valves and capillary tubes. Periodically, you should flush the system to remove these contaminants. This simple procedure helps protect the system and keeps it operating efficiently. Repairs: To be sure the system will operate properly, you should flush whenever you repair or replace components. Failed components may contain metal shavings, sludge and other debris that damage the system or affect the operation. R-134a Retrofits: In some cases, conversion procedures call for complete removal of existing oil in an A/C system before changing fittings and recharging with R-134a. Flushing is the most thorough means of removing the oil and it will also pick up any refrigerant residue in the system. Flushing combined with pulling a deep vacuum is your assurance the system is ready for the new refrigerant. Related "Robinair" Product Information AC Refrigerant Oil & Flush - Index Page Full Product Listing - Index Page