How do you flush an A/C system?

Question

96 s10 v6 4.3. new compressor and accumulator.Never did this before.

Answer 1

YOU can't. Unless you have an evacuator in your garage.

The propper amount of oil needs to be added as well as freon.

It needs to be "evacuated" after assembly to remove ALL the moisture in the system.
Then propperly charged, and leak tested.

You can assemble it, then have it serviced.....

Answer 2

they make flushing systems for a/c. it is used when a compressor has failed and debris are still in the system. you can do a flush without the tools. disconnect the hoses from the compressor and the accumulator, with a small funnel, pour denatured alcohol in the lines and use compressed air to blow through the hoses, condenser, and evaporator, avoiding flushing through the orifice tube. you will need to add oil to the components as much of it will be flushed out. when evacuating the system before charging, leave the vacuum on it for at least 45 mins to insure all moisture and solvent is removed.

Answer 3

step 1 un hook all lines in system ,throw away your drier.
step 2 use air pressure and blow opsite of freon flow on evap and condensorbig line blow in and out side is small one,do this a few times in short bursts to free up lodged particles.
step 3 do the same the other way only a couple times if nothing comes out go back and reverse flow again and leave air on for a little around a min or so ,you should see dirty oil coming out ,it may not be much so dont walk away .
step 4 use 1 can of crc brake clean step 5 put a couple of ounces of oil or mineral oil of any kind this will cause sludge and will cost you another compressor ,blow out oil and see if its pretty clean you may not be able to get 100 % clean oil out this is ok thats what the reciver drier will assist with
step 6 add 2 ounces of oil to every new part now your system is flushed there are a few key things in order for your system to operate correctly,your parts to last and stop leakage,oil all orings when assembling ,replace the drier and expansion valve ,do not open the drier caps or plugs until you are readyto install and pull under vacume or your drier will be no good ,after about 10-15 min the decasent balls that absorb moisture will be full and then they will not perform there job correctly so get the whole system ready and your vacume pump hooked in and rerady then install the reciever drier and evacuate promptly .all book s will tell you to vacume for 20-30min then ....next step.wrong you have just replaced the drier and the books all refer to a evacuation and recharge with monor repair your eentire sytem has been open and is now contaminated with moisture,thats what the vacume pump is for ,and with r134 a systems the more moisture you pull out the more cooling capacity you will gain ,on average i vacume down an r134a system for about 2-2.5 hours ,then let it sit and make sure 1 you obtained at leat 28in of vacume

Answer 4

i own a repair shop,and you really cant flush one out ,what happens is you pull down on the vacuum,and see if it holds good,this in turn will pull anything out of it that don't belong there,that's the only real way to do it ,and if it holds then you refill it,there shouldn't be anything in it just from changing compressors,so if it pulls down good it should have good cold air when its done,good luck i hope this helps.

Answer 5

you need a tech or read up. get a bag to disharge old freon into so you dont f up the planet.