How to Recharge the AC in a Kia Optima Hybrid

Introduction

• Kia Optima Hybrids (since 2013) use r1234 YF coolant
• The process can be done using a digital or analog gauge

Items Needed

• Digital/Analog Gauge
• Smart Clips (to indicate air temperature by color change)
• Safety gloves
• r1234 YF coolant (not r134a)

Steps to Recharge

1. Preparation

   • Install Smart Clips to gauge air temperature
   • Clips should show a neutral color indicating the air isn't cold

2. Engine and AC Settings

   • Turn on the engine and let it run for ~10 minutes
   • Set AC to Max and circulation
   • Turn off economy mode
   • Set temperature to the lowest setting

3. Recharging Process

   • Pop the hood and find the low pressure port labeled 'L'
   • Wear safety gloves (to avoid burns from hot system parts)
   • Attach hose adapter by pulling back the coupler ring (ensure a tight fit)
   • Check the reading on the pressure gauge
     • Aim for at least 50 PSI (variable based on ambient temperature)
     • On hot days (e.g., 97°F), aim for 55 PSI
   • Keep adding refrigerant until reaching desired PSI

4. Final Steps

   • Unplug the hose
   • Screw the cover back on the port
   • Verify that the Smart Clips indicate blue for cool and green for max cold

Conclusion

• Successfully recharged the AC system if indicators show appropriate colors for temperature

Reminder

• Always use the correct type of coolant (r1234 YF) for newer models
• Ensure gauge shows correct PSI based on ambient temperature