just change it . its really not that expensive to do. there are alot of problems with B12 A/C I disconected mine from inside the car so it wont ever run lol.. IT pissed me off i converted it to R134A and the fucker ran for a week great! then went hot again. I was going to Rip it out and save on some weight but then i thought damn I would love to have A/C again so im just waiting till i get enough money to put a new cars A/C system in mine if I can.