(1) Quik Check 2-Second Acid Tester which works with all refrigerants and oils including 410A. Tests for inorganic acids. Place on the low side service valve while the system is operating, if the color changes changes slightly, add Quik Shot Acid Flush to remove the acid. If the color changes to red, the acid level is very high. Change the oil and the filter-drier and add Quik Shot Acid Flush. www.qwik.com Product is not intended to detect mild organic acids produced from the breakdown of POE oil. Tests for inorganic acids to ARI-700. Made by Qwik Products/Mainstream Engineering.
Note: The compressor must be engaged or running to get a correct reading.