Auto air conditioning 101

This contamination eats away at the inside of the system resulting in rust and scale buildup, corrosion and erosion in vital A/C system parts. Proper A/C system leak tests are necessary to identify the source of a leak.

There are three types of leak inspections: visual, halogen, and dye testing. The visual test includes inspection of all lines and external components (specifically condensers, hi and low pressure lines, compressors, air dryers, and expansion valves). Any indication of refrigerant oil on these components is an indication of a leak and the component must be replaced.

The halogen tester is designed to detect the presence of leaking refrigerant gas, which is odorless and colorless. The tech scans the system with the flexible probe on the tester. If there is a leak, then the tester will howl, light up, or click.


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