How to change car ac oil?
Changing from R12 to R134a is very complicated, it requires flushing every component of the system using a special cleaning fluid to remove virtually all of the old oil then the components must be re-assembled using new seals and the expansion valve or orifice must also be replaced with the correct one for R134a. Servicing the Freon in an Air conditioner requires the use of a refrigerant recovery and charging station to evacuate any air or moisture prior to charging and properly adjust the Freon level and to avoid releasing Freon into the atmosphere when making repairs which require opening the sealed system – which is prohibited by federal Law due to the adverse effect Freon has on the Ozone in the air which protects everything on earth from excessive solar radiation – A/C service techs take extensive training before they can service systems because they are much more complex than they appear. This is not a DIY project… Take it to several shops to get estimates. On any major repair
