Jeep Air Conditioning – Information, Issues & Fixes

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Curious about AC system issues on your Jeep Wrangler? Take a look at our guide to your Wranglers’ AC system for more information on trouble shooting the AC, repair and replacements, charging the AC and more.

Given the popularity of the Jeep Wrangler, questions about AC systems on this vehicle are not uncommon. Because of its importance to safe driving, understanding the AC system function and maintenance is essential for every Jeep Wrangler owner. Read on or more on troubleshooting the AC system on your Jeep, recharging it, checking for leaks and more.

Troubleshooting AC on jeep wrangler

A common malfunction a wrangler’s AC system is a slipping belt and issues with refrigerant levels. This is where your knowledge of the AC system parts will come in handy. As we mentioned, the compressor runs using a belt or pulley system that is prone to belt malfunction. Here is a step by step to help you check for

  • Fist, open the hood to inspect the inside of your jeep. The accessory belt of the Jeep wrangler is located at the front of the engine. These models have a sizable compressor that you will see on the driver’s side of the engine bay. You can locate the belt on the side of the compressor. Remember, you are checking it for any wear or tear that may be cause for the malfunction. Damage or wear is often responsible for slipping on the compressor
  • Turn on the engine and then the AC to the coldest setting
  • Turn on the fan speed to the fastest setting
  • If you do not feel any cold air coming from our vents, then you might have low refrigerant levels in your AC system. This will call for a recharge by the professional. A faint hissing sound from the compressor may indicate a leak in the compressor that calls for an immediate replacement.

Common issues with the Wrangler AC system

Leaks are a common issue across the board when it comes to issues with AC systems. Even in Jeeps, when there is a leak in the system, you begin to experience all sorts of AC issues. Other factors including wear and tear similarly play a role in triggering issues with your Wranglers AC.

Dangers of refrigerant leaks

Leaks in your AC system often lead to problems with the AC system general function. However, that isn’t the only reason you must watch out for their occurrence. Apart from making your AC system work harder, and increasing your energy bills, refrigerant may affect the air quality and harm your health or the environment. If you suspect any leaks from your AC system, you must have it checked and remedied immediately. Some of the ways professionals use to check for leaks include

  • Electronic detection
  • Dye testing
  • Nitrogen detection bubbling

Jeep wrangler AC Repair and replacement

In the event that your AC system is shot, then you will require a replacement. It is important that you see a professional for a full diagnostics and solution. Once this is done, they will be able to determine what needs replacement or repair.

What happens when you take your Wrangler in for a replacement?

  • The mechanic will perform some diagnostics checks if you haven’t already conducted a troubleshooting session yourself.
  • They will run checks on the pressure of the AC system and proceed to check for power and ground at the compressor.
  • Next is to remove the refrigerant from the system and the AC components including the compressor, orifice tube, the receiver drier and such to flush out any debris or foreign substances that may be clogging the system.
  • The mechanic will proceed to fit all new parts that require replacement.
  • Once the professional has established that the installation is successful, they will run a final check to ensure your system is fully operation and functional.

Recharging the AC on your Jeep Wrangler

When your car stops blowing cool air, then it may be time for a recharge. With the right knowledge of AC system anatomy and a proper diagnosis, you can recharge the system yourself. Because the AC system is a closed system, then you do not need to regularly top off refrigerant.

If you plan of recharging your AC system, then you will need the right kit. Make sure you have the right type of refrigerant; cars made after 1995 usually use the commonly known Freon or R-134.

The first step is to find the low side port. The AC systems on all cars are divided into two sides based on the different pressures applied on either side. The low side port is the barb on the tube between the compressor and evaporator. You may need a crash course on parts of the AC system to help you identify these parts.

Next, screw on the dispenser hose and gauge to the new can of refrigerant. Once it is secured, you will have to start your engine and turn on the AC on maximum. Continue to check the gauge reading while you do this. Ideally, the compressor clutch shout be engaged while the front of the compressor spins.

The kit you have should have a pressure chart to guide you through proper system pressures. You should continue to check the pressure gauge while the refrigerant dispenses.

Lastly, you should confirm there aren’t any system leaks using a separate UV kit.

Installing AC on your Jeep Wrangler

Instructions for installing AC systems on jeeps vary depending on the model and year. Even within the Wrangler family, there might be some difference in some details in regards to installing the AC. However, many sites provide different manuals to help guide Jeep owners with AC system installation.

Final word

The AC is an important component to your Vehicle. There are various aspects of this system that every owner should understand such as troubleshooting or common cause and dangers of AC system failure. Understanding these aspects will help especially during a recharge or general AC system maintenance.

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Steven Reilly is a qualified mechanic and his passion for cars goes beyond just the technical aspects. He is also an amateur racer and all round car enthusiast. When he is not driving them, he can often be found in his garage under the hood of a rare model. Steven Reilly has lost track of the number of hours he has spent setting up his fine collection of rebuilt models. He believes that cars can provide a constructive and fun opportunity to teach the youth important life skills. In line with this, he is developing a community outreach program, potentially dubbed ‘Cars for change'.
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