Most automotive manufacturers recommend closed loop flushing with air conditioning refrigerant as a flushing agent. A benefit of this type of flushing is there is no danger of flush contamination , since the flush agent being used is the correct refrigerant for the A/C system.

Avoid this type of auto ac system flushing

Over the years many different liquids have been used as non-approved flushes for a/c systems. The more common are:

• Alcohol
• Brake cleaner
• Carburetor cleaner
• Mineral Spirits
• Penetrating oil
• R-11, R-12, R-113
• Gasoline

The use of unapproved chemical flushes can result in damage to rubber components in sealing washers, auto ac compressor shaft seals, O-rings and hoses.

At no time should these products be used as a flush agent. If a compressor failure is caused by non-approved flushing agent being left behind in the a/c system, it can void the compressor warranty.

How often should you flush your auto AC system?

When an auto A/C system has become contaminated with air, moisture, flushing agents, the automotive ac compressor oil is contaminated with an incorrect type of oil or from debris from an internal auto ac component failure , or the system has been overcharged with oil, dye,  it must be flushed.

What happens if you don’t flush the AC system in your auto?

The debris created from internal auto ac compressor failure can accumulate and become trapped in the various a/c system components , and restrict the flow of refrigerant and oil. When used in a quantity beyond what the dye manufacturer recommends, dye can modify the viscosity of the ac compressor oil and becomes contaminant. Air as a contaminant may cause decreased auto ac cooling performance, create car ac compressor noise, or increase system pressures. Contaminated auto a/c systems may cause hvac compressor failure, air conditioning hose and line damage due to excessive heat and high pressure and overall automotive a/c system performance decrease.

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