How long does it take before you can perform a dye test on auto a/c once dye has been added very small leak?

i have had problem w/ 04 tundra. dealership did pressure %26amp; dye test and can't find leak. now they say to drive it for a couple weeks to let dye circulate thru system and bring back for blacklight test. Freon has been slowly leaking out since purchase of new vehicle. I have had compressor change, o rings chg, low side a/c line chgd. every 6 months it needs charged. i believe i have a lemon. my warranty is still good thru august but feel they are giving me the run around. can anyone help?

How long does it take before you can perform a dye test on auto a/c once dye has been added very small leak?
Yes you need to run it a few days with the dye circulating the system. It sounds like a slow leak. They should have also used a Sniffer freon detector. There, they would recharge the system and then use the detector to sniff for leaking freon. I have seen leaks in all kind of places. Tell them also to do that along with the dye check.
Reply:Dye is apparent immediately as the Freon circulates through the system constantly. What they are saying is the small leak may not allow enough dye to leak out to show up immediately. Driving for several days should allow enough leaking dye to show up under the black light.