How to upgrade ac to r-134a?

Answer 1

To upgrade an air conditioning system to use R-134a refrigerant, first ensure that the system is compatible with R-134a, as it was designed for R-12 or other refrigerants. Next, evacuate the existing refrigerant and replace any necessary components, such as the receiver-drier and expansion valve, to accommodate the new refrigerant. Finally, recharge the system with R-134a, ensuring to use the correct amount and to check for leaks. Always consult a professional or follow manufacturer guidelines for specific procedures.