2018 Jeep Cherokee A/C Refrigerant & Oil Capacity

Quick Answer

• Refrigerant Type: R-1234yf
• Full System Charge: 17.6 oz (500 grams)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 4.7 fl oz (140 mL)
• Low-Side Service Port Location: On the refrigerant line, near the passenger side strut tower.
• High-Side Service Port Location: On the refrigerant line, near the driver side of the condenser, behind the grille.

Why R-1234yf Matters

The 2018 Jeep Cherokee utilizes R-1234yf refrigerant, a significant change from the older R-134a. This transition began around 2014 for many manufacturers due to new environmental regulations aimed at reducing the global warming potential (GWP) of refrigerants. R-1234yf has a GWP significantly lower than R-134a, making it more environmentally friendly.

However, this comes with some implications for vehicle owners and technicians:

• Cost: R-1234yf is generally more expensive than R-134a, which can lead to higher repair costs if your system requires a recharge or component replacement.
• EPA Regulations: Due to its environmental impact, the EPA heavily regulates the handling and disposal of R-1234yf. Only certified technicians with specialized equipment are allowed to work on these systems.
• Recovery Machine Requirements: R-1234yf systems require specific, often more expensive, recovery and recycling equipment. This means not all shops are equipped to service vehicles using this newer refrigerant.

Recharge Procedure Cautions

Recharging an R-1234yf A/C system is not a DIY task and should never be attempted without the proper training and equipment. Here's why:

• Evacuation is Crucial: Before adding any new refrigerant, the system must be properly evacuated to remove all air and moisture. Moisture in the system can lead to component corrosion and system failure.
• Charge by Weight, Not Pressure: Unlike older R-134a systems where some DIYers might attempt to charge by pressure readings, R-1234yf systems are very sensitive to the exact amount of refrigerant. The only accurate way to charge the system is by weight, using a precise A/C charging machine. Overcharging or undercharging can lead to poor cooling performance, increased compressor wear, and potential system damage.
• Contamination: Mixing R-1234yf with R-134a or other refrigerants can severely damage the A/C system and the specialized recovery equipment, leading to costly repairs.

Common A/C Problems for the 2018 Jeep Cherokee

While the 2018 Jeep Cherokee generally has a reliable A/C system, some common issues can arise:

• Compressor Failures: The A/C compressor is the heart of the system. Failures can manifest as a lack of cold air, loud noises from the engine bay when the A/C is on, or a burning smell. These can be due to natural wear and tear, insufficient lubrication (low oil), or foreign contaminants in the system.
• Condenser Issues: The condenser, located in front of the radiator, can be susceptible to damage from road debris. A damaged or clogged condenser can restrict airflow and reduce the system's ability to dissipate heat, leading to poor cooling.
• Evaporator Leaks: The evaporator is located inside the dashboard and can develop leaks, often indicated by a sweet, musty odor coming from the vents, or a visible stain under the passenger side of the vehicle. Evaporator leaks are generally more labor-intensive and costly to repair due to their location.
• Electrical Issues: Problems with sensors, relays, or wiring can interrupt the flow of power to A/C components, preventing the system from operating correctly. This might present as intermittent cooling or the system not engaging at all.

When to Call a Pro

If you're experiencing any A/C issues with your 2018 Jeep Cherokee, it's always best to consult with a certified professional. Given the complexities of R-1234yf systems and the need for specialized equipment, attempting repairs yourself can lead to further damage and safety hazards. A professional technician can accurately diagnose the problem, safely recover any remaining refrigerant, perform necessary repairs, and recharge the system to the manufacturer's exact specifications.

Safety Disclaimer: Working with automotive air conditioning systems can be dangerous. Refrigerants are under high pressure and can cause severe frostbite if they come into contact with skin or eyes. Improper handling can also release harmful chemicals into the atmosphere. Always defer to EPA 609 certified technicians for any A/C service and ensure they are utilizing proper safety precautions and equipment.

Find a certified A/C shop on Repairius.