A dye based air conditioning leakdown test uses a colored dye to find freon leaks in your air conditioning system. Using this test, a colored dye is injected into the a/c system which will be visible under UV (ultra-violet) light at the point of a leak anywhere in the system. The test is performed under full pressure with the air conditioning system closed (sealed as if you were driving under normal conditions). This is a good idea if you are thinking of recharging your AC system
because recharging a leaking system is a waste of time and money.
If you're curious about how your AC works, check out How Your AC System Works and you'll be one step closer to air conditioning expert.
Also Known As: Freon Leak Test, UV Test
Common Misspellings: AC, froen,