1. Always leak test with the engine off.
2. Only, a small amount of refrigerant is required to perform a leak test. A gauge reading of 50 psi is all that is needed. At temperatures below F, leaks may not be measurable, since 50 psi may not be attainable.
3. To avoid contaminating the tip of your leak detector, remove excessive dirt from suspected leak areas. Do not use cleaners or solvents, your detector maybe sensitive to their ingredients.
4. Visually inspect the system, and look for signs of air conditioning oil leakage, damage, and corrosion on all lines, hoses, and components. Each suspected area should be carefully checked.
5. Follow the system around in a continuous path to ensure that no areas are missed. If a leak is found, continue to check the remainder of the system for additional leaks.
6. At each area checked, move the probe tip around the location at about 1" per second while holding the probe no more than 1/4" above the surface of the area being leak checked.
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