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How to use dye from bulk container of 134a

davebb on Fri February 06, 2015 2:57 PM User is offline

Year: 1970
Make: ford
Model: f250
Engine Size: 390
Refrigerant Type: 134a
Country of Origin: United States

Hi. I've been searching the site for using dye. Looks like 1/4 oz. is plenty. I bought the bulk container of 134a with dye in it already. It says on the container to invert if you need dye. My question is....Do I just keep it inverted until a quarter oz. is shown on the scale then turn it right side up? My thinking is that if I keep it inverted for the whole charge that would be too much dye. Thank you! David.

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I like retirement. I can almost afford to have someone else fix my A/C

mk378 on Fri February 06, 2015 6:12 PM User is offline

You would invert the container for the whole charge, since the dye is dissolved in the liquid refrigerant. This poses an interesting situation since if you were to later remove some refrigerant as gas, the dye concentration in the remaining liquid will increase beyond what was intended. Usually dye is either added separately of with a 12 oz can containing the 1/4 oz of dye so you use the whole can then finish charging with plain refrigerant.

After charging, the dye dissolves in the oil and stays there even if all the refrigerant is removed or leaks out. Do not add dye again unless you flushed all the oil out to start over.

Edited: Fri February 06, 2015 at 6:16 PM by mk378

davebb on Fri February 06, 2015 11:41 PM User is offline

Thank you mk378. Much appreciated!

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I like retirement. I can almost afford to have someone else fix my A/C

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