What Causes Jeep Wrangler Heater Not Working Issue? Fix Now

Your jeep’s heating system is aimed at keeping you warm, secure, and comfortable when it’s cold outdoors. In order to give you the ideal heating solution, several of the essential elements of your car’s air conditioning unit work together. The heating system in the Jeep failed when one of these components suffered damage.

You may quickly resolve this problem by repairing or replacing the problematic components, such as the blower motor, thermostat, heater core, etc. However, there are situations when swapping out these components won’t be enough to solve the issue.

Furthermore, you will require additional understanding to finish this procedure. In-depth discussions on a number of topics that will aid you in resolving this issue are provided throughout this article.

7 Easy Solutions For Jeep Wrangler Heater Not Working Problems

The most important mechanical component of a Jeep Wrangler is its heater.  After a prolonged operation, a heating system can be damaged just like any other mechanical component. In the event that you discover that the heating system is malfunctioning, you must address the issue right away.

Here are some solutions which may help you to solve this issue easily. 

#1- Change The Damaged Heater Core.

A heating core leakage is among the most typical issues that might affect a vehicle. The Wrangler’s heating core is a little radiator that circulates heated coolant throughout the vehicle. It operates in exactly the same manner as a radiator.

There are a number of signs that will help you figure out whether the heater core needs to be replaced. Some of these indications are: 

  • Constant loss of engine coolant.
  • Sweet odors in the vehicle.
  • The cabin has cold air.
  • Fog inside the jeep.
  • There is no heat.
  • Overheating engine.

If you have these problems, you should replace them right away. For a novice, replacing a heater core is a difficult process, but with the correct equipment and enough time, you can replace it. However, we advise you to change this with the assistance of a skilled mechanic.

Replacing the heater core for Jeep Wranglers typically costs approximately $1,000 to $1,200. While materials price will be around $400 to $450, and the labor expenses will vary between $550 and $650.

Read Also: 7 Fix For Jeep Wrangler Passenger Seat Won’t Fold Forward!

#2- Clear Blocked Vents.

The principal air passageway in the jeep is through vents. Air cannot effectively travel through the heating vents of the Jeep Wrangler if they are blocked or damaged. 

To solve this issue, you have to just clean the vents properly. To clean it, you should use a soft brush. You can also use an air blower. But, if the dirt is clogged badly, you have to take out the whole vents and wash it thoroughly.

This is a simple process, and you can do it without any extensive knowledge. You can fix this issue without spending any money. 

#3- Replace Or Repair A Malfunctioning Thermostat.

The thermostat is in charge of controlling the engine’s coolant flow. When the engine gets cold, it remains shut to allow for warming. Besides, it slowly opens when the engine warms up, enabling coolant to enter the radiator. The jeep heater ceased to function correctly whenever it started to fail.

A vehicle’s thermostat could be jammed because of rust or age. It is necessary to keep a few things in mind in order to prevent the car’s thermostat from malfunctioning. 

One of these is making sure the coolant is changed on a regular basis and properly to prevent air from getting into the system, which might cause overheating or defective sensors. Here are a few warning signs of thermostat failure.

  • Irregular temperature fluctuations.
  • Temperatures that are high.
  • Leaks of coolant.
  • Gasoline usage has increased.
  • Unusual sounds and thermal shifts.
  • Both heating and cooling.

The easiest way to fix this issue is to replace the malfunctioning thermostat. Although replacing it can appear simple, there are a few delicate elements that a novice technician might damage. So, you should seek the assistance of a skilled professional.

Replacement thermostats for Jeep Wranglers typically cost around $350 to $450, and the labor expenses are expected to range from $60 to $80, while only the component prices can be around $300 to $350.

Read Also: Jeep Wrangler Back Door Won’t Lock or Latch – What To Do?

#4- Clean Out Clogged Air Filters.

The heater air filter in your car prevents debris from entering the heating system and potentially harming vital parts. Air filters should be changed between 10,000 and 15,000 miles, while they might need to be cleaned more often for vehicles operating in congested regions.

A blocked air filter might result from not changing a filthy air filter. If an air filter becomes blocked, it may malfunction, allowing impurities like dirt to enter the heating system. The heater may sustain lasting damage as a result and operate incredibly poorly.

Replacement air filters for Jeep Wranglers typically cost around $60 to $80. The cost of labor is expected to be about $20 and $30, while the cost of equipment is around $30 to $40.

#5- Fill or Change The Heater Coolant

The Jeep heater utilizes coolant, much like every other vehicle, to cool the engine down in hot weather and to circulate heated air through the heat exchanger in cold weather. The coolant normally contains antifreeze and water in a 50:50 ratio.

Although coolant might seem to be a fairly general subject, it is crucial to choose the right coolant formula for a specific Wrangler model and engine. Here are a few coolant categories which you may use in your jeep. 

  • IAT (Inorganic Acid Technology)
  • OAT (Organic Acid Technology)
  • HOAT (Hybrid Organic Acid Technology)
  • Dex-Cool

You should be aware that there are several kinds of coolants and antifreeze. The quality of antifreeze definitely plays an important role, especially if your engine is older. If you use the incorrect coolant, the heater system may stop working.

You have to change the coolant every 30,000 miles to get the best performance. To prevent any unwanted damage, you should change or refill it with an expert mechanic. This may cost you almost $300 to $400. 

Read Also: How Much Does It Cost to Wrap a Jeep Wrangler?(Full Guide)

#6- Replace The Faulty Water Pump.

A water pump plays a crucial function in maintaining the coolant’s circulation, which is necessary to ensure that the engine runs at the right temperature. The engine may overheat if coolant is not circulated, which can cause excessive damage and failure. A malfunctioning water pump may potentially leak more coolant.

Water pumps are intended to endure for at least 100,000 miles, but if yours breaks down, you must change it with a premium piece of original parts. Although there are less costly replacement pumps available on the market, they can only last 30,000 miles.

You should budget somewhere between $350 to $750 for replacing it after taking all of these factors into account.

#7- Replace The Damaged Blend Door Actuator.

A blend door actuator is yet another crucial component of your Jeep’s heater system. The climate control system in your automobile is managed by these components. It appears to be a little plastic container with some inside plastic gears.

Additionally, it performs a crucial duty. The blend door actuator receives signals when you change the dial to modify the airflow or temperature. Also, it regulates ventilation and defrosters.

There are some signs that indicate that the blend door actuator is damaged. And, if you determine the main signs of its damage, you can easily solve the problem.  Signs that your blend door actuator is failing.

  • Unusual noises.
  • Unpredictable temperature.
  • Sound of thumping or clicking underneath the dashboard.
  • The temperature of the climate control outlet is incorrect.

Replace them as soon as possible if they have these issues. If not, there might be more severe harm.

Resetting this component can sometimes solve the problem quickly. However, because the precise calibration process may vary depending on the vehicle model, you should check your repair manual or maintenance database to fulfill the requirements.

You should typically budget around $200 to $500 for the service if you want to have a technician replace the blend door actuator in your vehicle.

Read Also: Why Jeep Wrangler Hood Won’t Open? (7 Causes & Fix)


There may still be some queries in your mind after reading this article. In this section, we did our best to respond to the questions that were asked the most. Read through this FAQ to acquire the explanation you want.

How long is the life of a Wrangler heater core?

A heater cores aren’t the only vehicle component that wears out eventually. Typically, a heater core will survive between 10 and 15 years. But much sooner than that, a heater core might start to fail.

Is it tough to repair a Jeep Wrangler’s damaged heater system?

No. If you know how to manage them properly, you can easily fix these problems. However, occasionally, certain problems will be out of your hands, and in this situation, you must seek a professional’s help.

Can a Jeep Wrangler be driven safely if the heater is damaged?

You can continue to drive even in this situation, but you shouldn’t drive for a long time. A defective heater system may impact the cooling sensation, which subsequently causes the temperature to rise.

How long should your Jeep be heated?

During the winter, you should let the jeep run for approximately one or two minutes to heat up. Although some drivers like to let their engines run for twenty minutes thoroughly warm them up. But, driving is the quickest method to do it.


After you’ve tried all the first solutions suggested in this article, getting aid from a trustworthy car repair shop or qualified mechanic will help prevent the heater issue with your Jeep from happening again.

Additionally, you may avoid needless hassles and high repair expenses by carefully inspecting several indications, maintaining your vehicle regularly, adhering to manufacturer guidelines, and caring for it properly.

Finally, always try to keep the vital parts of your Jeep in good operating condition, especially the heating system. If they quit operating, you will also encounter a number of serious issues.

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