2025 Jeep Wrangler — A/C Refrigerant & Oil Specs

Quick answer

• Refrigerant: R-1234yf (factory fill on all 2025 Wranglers)
• Total system charge: Commonly in the ~525–600 g range (≈18.5–21.2 oz). Exact capacity varies by engine/door count; verify the underhood label for your VIN.
• A/C oil (gas models): PAG 46; total system oil typically about 120 mL (≈4.0 oz). Add only the specified amounts when replacing components.
• Important trim note: Wrangler 4xe (plug‑in hybrid) uses an electric A/C compressor that requires POE (ND‑11) oil, not PAG. Do not mix oils.
• Service ports: Low‑side port on the suction line near the right/passenger side firewall or accumulator area. High‑side port on the liquid line near the condenser/front right of the radiator support.

Why R-1234yf matters

R-1234yf is a low‑GWP refrigerant that replaced R‑134a on most new vehicles after the mid‑2010s to meet EPA and global environmental rules. It behaves similarly in service but has some key implications:

• Cost and availability: R‑1234yf is significantly more expensive than R‑134a. Accurate leak diagnosis before recharging saves money.
• Dedicated equipment: By law, shops must use an R‑1234yf‑specific recovery/recycle/recharge (RRR) machine, hoses, and fittings. Do not attempt to charge yf systems with R‑134a gear or refrigerant.
• Safety and compliance: Mixing refrigerants or oils can damage components and is illegal. Always recover and charge by weight with certified equipment.

Recharge procedure (high level)

• Confirm specs: Read the exact charge weight and oil notes on the Jeep’s A/C underhood label and in Mopar service info for your VIN.
• Leak/contamination check: Use an SAE J2913‑compliant electronic leak detector rated for R‑1234yf and/or nitrogen pressure testing with trace dye per OEM guidelines. Repair leaks before charging.
• Evacuate properly: Connect an R‑1234yf RRR machine, recover any remaining refrigerant, then pull a deep vacuum (typically ~30 minutes; verify OEM procedure) and confirm it holds.
• Charge by weight: Add the specified mass of R‑1234yf into the evacuated system. Do not “top off” by pressure. The Wrangler’s performance is charge‑sensitive; a small over/undercharge can hurt cooling.
• Oil handling: Only add oil when components are replaced, and in the amount specified by Mopar (for example, compressor, condenser, line, or evaporator replacement each has a defined add‑back quantity). Gas models use PAG 46; Wrangler 4xe uses ND‑11 POE oil.
• Post‑charge checks: Verify clutch/variable compressor engagement (or electric compressor operation on 4xe), condenser fan function, outlet temps, and pressure behavior with scan‑tool data (cooling fan command, A/C pressure/temperature sensors, blend door positions).

Common A/C problems for this vehicle

• Condenser damage/leaks: The Wrangler’s upright grille leaves the condenser exposed to road debris; pinhole leaks and bent fins are common causes of gradual performance loss.
• Line and O‑ring seepage: Crimp joints at the condenser and compressor suction/discharge lines can weep, especially after off‑road vibration. UV dye often reveals these early.
• Compressor/control valve issues (gas models): The variable‑displacement compressor can underperform if the control valve sticks or if charge is slightly off. Symptoms include cycling with warm vent temps at idle.
• HVAC door or calibration faults: Blend/recirc door actuator issues or HVAC module calibration drift can mimic low charge. A scan tool can command doors and read actuator positions.
• Cabin air filter restriction: 2020+ Wranglers use a cabin filter behind the glove box; a clogged filter cuts airflow and perceived cooling.
• Cooling fan/airflow problems: Faulty fan modules or debris between condenser and radiator raise high‑side pressures and kill A/C at low speed.
• 4xe‑specific: Electric compressor isolation faults, incorrect oil type, or battery chiller circuit issues require high‑voltage‑safe procedures and Mopar diagnostics. Do not service the 4xe A/C without EV‑safety training.

OEM service info

For exact charge weight, oil amounts by component, and diagnostics, reference:

• Underhood A/C label (authoritative for your VIN)
• Mopar Service Information (TechAuthority) for 2025 Wrangler HVAC
• Any applicable Jeep TSBs for A/C performance, condenser leaks, or HVAC module updates

When to call a pro

• You don’t have an R‑1234yf recovery machine and scale
• The system won’t hold vacuum, or performance drops soon after a charge
• Pressures or sensor values are abnormal, or the compressor/fan won’t command on
• You own a 4xe (high‑voltage A/C system and ND‑11 oil only)

Safety disclaimer: Servicing mobile A/C systems requires EPA Section 609 certification in the U.S. Always use R‑1234yf‑rated equipment, recover and charge by weight, and verify the exact specifications on the vehicle label.

Find a certified A/C shop on Repairius.