A/C hot air

Hello,

Yep sometimes the dye will not show up which is normal. the best way to find the leak is to use a leak detector, here is a guide that will show you how to get the job done.

https://www.2carpros.com/articles/air-conditioner-leak-detection

and

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

Please run this test and get back to us so we can continue helping you.

Cheers, Ken