hi new here i got a 2001 sable ls
153,000 miles

the ac with the car seems to work on and off
i charged the a/c with

Quest/17 oz. of R134a and 2 oz. of Sub Zero A/C Booster with Shelf Saving Dispenser

but it was labled napa lol

any ways the ac works fine for a while and then about 2 days later
it seems that as soon as i drive the car around a while and every thing heats up

the ac just blows out hot air


any ideas any one

 

you have a leak somewhere in the system. could be in the compressor or just a loose fitting or schrader valve or a hole in the system somewhere. Definitely a job for someone that knows how to track that stuff down.