replaced ac system and charged

[1131dolphins]

I replaced my compressor condesnsor dryer and orfice tube line
added the correct oil amount and charged
its blowing cold

only thing is when I turn the car off I hear Freon pressure under the hood like its equalizing or leaking one of the two it does it for like 15 seconds

anyone know what this is
thanks

[Dougflas]

Low side equalizing to the high side. completely normal

[1131dolphins]

I think your right
its been about a week and its still blowing cold I been running it for a few minutes a day just to check and let the car run I don't drive the car right now