My car AC is not cooling and i have refill it some months back now it blowing heart again the outside temperature is 33 what gadge will i place the AC-PRO?

Anderson

 

You have a freon leak.
Take it to an Automobile Air Conditioning repair Shop.
They have the proper tools,equipment, and experience to diagnose your problem.

Telcoman

 

Yep, a good rule of thumb is if you have to put in a whole can of AC pro and it doesn't hold for at least a year then the leak is substantial and you need to actually get it fixed. Easy enough to find the leak, just make some dishwashing detergent plus water mix in a spray bottle and lightly squirt every fitting it will make what looks like "white foam" when you find the bad fitting.

Then you reclaim refrigerant, disassemble and replace worn seals or components, charge system with nitrogen and verify no more leaks, pump down system to remove moisture, refill with factory spec levels of oil and refrigerant.

Legally in most places you cant do the work without refrigerant licensing but it's definitely not hard to do yourself, just gotta have the manifold, vacuum pump, refrigerant.

If you continue to just use AC pro you will eventually fry the compressor which is expensive. If you find the leak for the techs they might work with you on the price maybe.