Hello, was there any repairs made or is the system just low? if doing a simple recharge you will need a gauge set attached to both the high and low side service ports, this will tell you if the compressor is actually compressing refrigerant, here is an excellent article that will help you.
https://www.2carpros.com/articles/re-charge-an-air-conditioner-system
Though its a full vacuum down and recharge, it will troubleshoot and give good instruction on where to go next, please let me know what you find.
Thanks for using 2CarPros.com - Ken
Thursday, May 14th, 2015 AT 4:16 PM