Errecom Brilliant - 0.2 fl oz (7.5 ml), Fluorescent UV Dye for Detecting Refrigerant Gas Leaks in Vehicle A/C Systems, Includes R134a Adapter

Works perfectly!

Item is actually easy to use. I was hesitant when I first got the item and messed up the first one and ordered a second one after I figured out what I did wrong. The product comes with two adapters for the two different types of coolant: R-134a (black) cap and R-1234yf (green) cap. It doesn't say, not that I've seen, which one goes on which. So I thought logically, well, to me anyway, low pressure on my R-134a is green, so it must be the green cap. I lost coolant, and product went everywhere. Then I laughed when it reminded me of the review I saw about losing all of the product through the top. Purchased another one, used the black cap, clicked it into place, attached product, injected, and let the vehicle run for 30 minutes. Only time will tell if it worked. Instructions should be included explaining a few things: * Do it when it has a fully charged AC system. * Start car. * Put on lowest AC setting. * Black cap is R-134a. * Green cap is R-1234yf. * Run car for 30 minutes. * Done. (update) This is the longest i have ever had ac in this car. So i guess that would mean it works

did not display any leaks. The AC system gets low on R134 after 3 months but none of the joints or condenser fins showed any leaks.

So far so good. Used in a 12k BTU unit. Was leaking its Freon over the course of a week. Since putting in the Errcom solution the unit has held steady for three weeks. Time will tell how long this lasts.

Without the car running, the low pressure line is too pressurized and it wont let you inject. Make sure the car's AC compressor is running by setting the AC to its lowest setting and blasting the AC with the windows down so it wont turn off. This will relieve pressure and let you inject the dye. No instructions with the product which sucks. But this is such a cheap solution compared to others I'm still giving it 4. It would be 5 stars if they simply included paper instructions in the product.

Permite encontrar fugas en el sistema de AC del carro de manera efectiva. Con poca luz es mucho mejor y además es importante que no halla derramenes de fluido de motor o de transmisión porque también adoptan un color verde con la luz UV.

This stuff is awesome, finally found something that stopped the leak in my mini-split.

Followed the instructions and final review. Absolutely horrible. Cheap plastic syringe blew out and the leak detector dye got all over the engine and other parts. No way to see where the leak is because the dye is literally everywhere. Waste of time. Im never buying this again.