A/C Flush?

[jv982]

Does anyone have any experience with the auto parts store's off the shelf compressed a/c flush kits?

Are their any suggestions on a DIY a/c system flush?

 

[RobbieD]

I bought and used a flush gun, which is basically a converted GM drier. It works by unscrewing the top, pouring in a few ounces of flush agent, putting the cap back on. Then it's pressurized through a Schrader valve. It has a flexible hose with a lever-operated blow nozzle, that's placed in the AC component's inlet or outlet, and the lever squeezed which shoots the pressurized agent through the component. This type worked pretty good for me, but I had removed and broke the AC system down into individual components. I don't how well this type would work on a mostly-connected AC system still in the vehicle; likely not as well as it did on single components.

 

[jv982]

So is there any advantage to that over just pouring fluid into the a/c components and blowing them out with an air compressor?

 

[RobbieD]

Honestly, I don't know except that what exits the flush gun is like an atomized spray at high velocity and pressure, and the component gets this effect from inlet point throughout to exiting. It would seem that pouring in the flush chemical and then blowing it out would be almost as good, but perhaps not as consistent or effecient.

 

[envious8420]

at work we use a liquid flush and just pour it into a component and blow it through the system. blow just long enough until the flush begins exiting the system, then give it 10-20 minutes to do its thing then blow steadily till the flush is completly gone.

why are you flushing?
did you have a failure?