The air conditioning is a blessing, particularly in warm temperatures. Do you still sweat while driving your Jeep Grand Cherokee? Your air conditioning system no longer cools properly? This deserve to have actually various reasons. What these are and also what you deserve to perform about it, we explain in this article.

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Jeep Grand Cherokee fourth generation – (photo by Jeep)

The most prevalent causes that hinders normal operation of air conditioning system on your Jeep Grand also Cherokee are dirty cabin air filter, refrigerant leak, dirty or clogged condenser, dirty or clogged evaporator, negative breduced motor, defective compressor, faulty blfinish door actuator or any kind of fault in the electrical device.

1. Dirty cabin air filter

The pollen filter, also well-known as the cabin filter or microfilter, is a main component of the ventilation system in your Jeep Grand Cherokee. A dirty filter reasons the as a whole ventilation of the inner to deterioprice bring about diminished cooling, heating and also air circulation. It additionally puts unvital strain on the whole AC system which negatively results your Grand also Cherokee’s fuel intake.

There is no prescribed time for changing cabin air filter, yet the majority of manufacturers recommend a change after 10,000-20,000 miles. If you drive your vehicle in dusty or polluted atmosphere, the filter have the right to gain dirty much sooner than manufacturer’s recommendation.

Start by inspecting the condition of the cabin air filter on your Grand Cherokee. Instead of changing it straight, it is frequently recommended to first clean the pollen filter. This can be done, for instance, through a vacuum cleaner or a compressed air mechanism, removing at least a huge part of the visible dirt particles. Unfortunately, this procedure does not allow you to get right into the deeper layers of the filter. Thus, the filter performance will not rise considerably also after cleaning. As a dominance, there is no avoiding a adjust.

Video: Replacing cabin air filter in Jeep Grand also Cherokee

You don’t necessarily need to visit a workshop to clean or rearea the pollen filter on your Grand also Cherokee. You have the right to accessibility the filter by complying with a few basic procedures, as presented in the video.

Note: Dirty cabin air filter greatly only leads to diminished cooling. If just hot air comes out of the air vents in your Grand Cherokee, then the difficulty most likely lies somewhere else.

2. Dirty or clogged condenser

Like the radiator, the air conditioning condenser on Jeep Grand Cherokee sits at the front of the auto and also is responsible for releasing the warm from the refrigerant right into the ambient air. Gradually, grime, bugs and also various other tiny pwrite-ups have the right to construct up on its surconfront and in the gaps of its mesh. This hinders the condenser’s capability to release warm as much less air passes through the mesh, which results in negative cooling in the inner.

If the condenser is dirty on your Grand Cherokee, the easiest solution is to clean it. For this you typically need to remove the front bumper to acquire access to the condenser. You can usage power washer for cleaning, however make certain that its at low press establishing, as high push deserve to conveniently damages the fragile fins on the condenser.


A clogged or leaking condenser deserve to additionally be the reason for air-conditioning not working appropriately on your Grand also Cherokee. A leaking condenser deserve to lead to a loss of refrigerant and diminished cooling performance of the system. In order to discover leaks in the air conditioning mechanism, a leak search is carried out in the workshop using creating gas – also the smallest leaks have the right to be detected. In this method, it have the right to be established whether the loss of refrigerant is due to a defective condenser. If this is the case, the only option is to relocation the damaged component.

3. Refrigerant Leak

Inenough amount of refrigerant is still the main reason of a non-functioning AC device. A loss of as much as 15% of the refrigerant per year is normal due to the architecture. If you don’t have the system serviced frequently on your Grand Cherokee, the refrigerant level will ultimately get so low that the device loses its cooling capacity. Just have it refilled and you can drive through pleasant temperatures aacquire. If the refrigerant level goes down aget quickly, then it suggests tright here is probably a leak.

In addition to the normal loss, component defects are typically responsible for the escape of the refrigerant gas on Jeep Grand Cherokee. A defective sealing ring, a worn line or a condenser that has been damaged by a stone chip are the many prevalent reasons.

Finding these largely very little leaks is often not simple. The mechanism is filled through developing gas (nitrogen via a little hydrogen) in the workshop. Larger leaks might already be heard or you deserve to discover them via a leak detection spray. Smaller holes have to be localized by looking all components through a gas detector. Once the leak has actually been found, this need to be closed aget by replacing the respective component.

4. Dirty evaporator

Dirty evaporator can also be the factor for AC problems on your Jeep Grand also Cherokee. Cabin air filter captures a lot of of the dirt or other airborne pshort articles, yet some escape and fall on to the evaporator. Gradually, these dust particles have the right to builds up on the fins and also block the air flow with the evaporator, leading to poor cooling.


The two most prominent symptoms of a clogged up evaporator on your Grand also Cherokee are:

The air circulation from the vents is choppy and not smooth.The inside of the vehicle is occurring a bad moldy smell.

Cleaning the evaporator on Grand Cherokee is not a straightforward job. In most instances, the whole dashboard hregarding be rerelocated before you have the right to accessibility the evaporator. Therefore it is recommended to carry out this at a workshop.

Tbelow deserve to likewise be a refrigerant leak in the evaporator, in that case the evaporator will have to be reput.

5. Compressor failure

The compressor is the heart of the entire air conditioning device on Jeep Grand also Cherokee. It consists of relocating components that convert what is actually a gaseous coolant right into liquid – this is just how your automobile is cooled.


A damaged compressor is commonly irreparable. If the air conditioning is switched on frequently, the components also remajor movable. However, if you don’t revolve on the air conditioning on your Grand Cherokee for a long time, the parts will stick. The result is a defective compressor that deserve to no much longer be repaired. The just point that helps is swapping with a brand-new one.

The worst damages, but, is a faiattract of the AC compressor when it “eats” itself due to inenough lubrication or a production error, steel chips create, which are spread throughout the Grand Cherokee’s AC device. If you just install a new compressor right here, one more faientice is inescapable, as the chips instantly destroy the new component. In such a situation, practically the entire air conditioning system hregarding be replaced. A maximum of the metal pipes deserve to be rinsed below. Since the 2 warmth exchangers (condenser and also evaporator) are designed in cross-flow style, the detergent finds the course through the leastern resistance and also leaves the chips behind. However before, the high-push refrigerant pulls these chips ago via it throughout procedure and the next damage is unpreventable.

6. Bad breduced motor

If there is no air circulation or lessened air flow from the vents on your Jeep Grand also Cherokee, negative breduced motor can be the culprit. A worn out or weakened blower motor can also create abnormal sounds as soon as in procedure.


You cannot repair a broken breduced motor, the component need to be reput via a brand-new one.

Note: If the breduced motor unexpectedly falls short from one second to the next, you must first examine whether a blown fuse is responsible for the faientice.

7. Faulty blfinish door actuator

Blend door actuator plays a duty in managing the air flow and temperature inside your Grand also Cherokee. Anytime tbelow is a trouble with the temperature of the air conditioning mechanism, it could be a trouble via the blend door actuator.

The the majority of widespread symptom of faulty blend door actuator on Jeep Grand Cherokee is a slight clicking sound repetitively coming from under the dashboard. The sound will be many influential for a few secs when you revolve on the air conditioning or change the temperature. Sometimes changing the temperature have the right to temporarily soptimal the sound.

A knocking noise might be one more indicator of a poor blfinish door actuator on your Grand also Cherokee, although its rather rare. The sound is somepoint favor a light tapping on the door and also it happens when you revolve on the air conditioning mechanism or revolve off the engine.


There are many type of reasons why air conditioning might not be working effectively on your Jeep Grand Cherokee. When looking for the factor, you need to constantly begin through the many obvious cause, low refrigerant level in the system.

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In any type of instance, it is advisable for laypersons to visit a workshop. In the event of a defect, the mechanic can straight initiate the repair.