So my brother has a 2014 Dodge charger and it has the newer refrigerant r1234yf and he the car was not blowing as cold as it used to, he lives in Florida. He picked up a self service can and somehow added about 1/3 of a can of r134. He said the the connection seemed a bit tight but that some did get in. I read the can and figured out that it was the wrong stuff. So I guess my question is what should he do? Will this ruin his system? can he just have the system vacuumed down and replaced with new r1234yf? Any assistance and or advise would be helpful. Thank you and Happy Holidays.