Chosen Solution
geef2 both will work but the freon detector is a lot neater, requires less preparation and will not require any change/adding of refrigerant. The UV light requires the dye to actually leak out under pressure somewhere. So, for that you would want to make sure that your engine and AC plumbing is relatively clean. You would also need to add a considerable amount of dye refrigerant to your AC system for it to show under the UV light.
You need to good to the auto store and install leak dye into the system. Wait until it is dark outside and use a leak lamp. Ask the auto store person what you need. They will sell you something or check it for you.
