Can you refill the R-134a refrigerant in a 1998 Jeep yourself or does professional have do it?

While it is possible to refill the R-134a refrigerant in a 1998 Jeep yourself, it is not recommended unless you have the proper tools and knowledge. R-134a is a potent greenhouse gas, and improper handling can result in environmental damage and potential injury. If you do not have expertise in refrigerant handling, it is best to have a certified professional perform the task.