I live in the Northern area of the US, and I have a heat-pump style AC unit. So there is an AC unit with big fan outside my house, and there is a furnace in my attic. I bought this house 10 years ago brand new and came with this setup.
So lately the AC is not putting out cool air and requested HVAC export to do a refrigerant refill. The HVAC guy told me that he increased the refrigerant level from 55 lb to 75 lbs. He also mentions 70 lbs were recommended by the manufacture.
An hour after the refrigerant refill, I still don't feel any cold air coming out from my ceiling vents, it's just normal fan air. Also, I have replaced all my home air filters already.
What should I do next? The label for my AC Unit is as below: