Ron Ananian The Car Doctor

This is the stand alone interview from the June 7, 2025 Hour 1 Show. Ron Ananian ("The Car Doctor") and Isaac Nielsen of Mahle Aftermarket discuss modern automotive A/C systems, focusing on R-1234yf refrigerant and the importance of proper service equipment. R-1234yf replaced R-134a and requires stricter handling due to contamination risks. All A/C machines now include oxygen sensors and refrigerant identifiers to ensure refrigerant purity (≥98%) and prevent system damage. DIY charge kits and low-quality refrigerants (especially imports) can harm vehicles and equipment. Maintenance tips: Check filters for discoloration, clean internal lines with isopropyl alcohol, and flush hoses weekly. Oxygen sensors degrade over time, even in storage—only buy replacements when needed, as early shelf life affects performance.