Here's how to troubleshoot and fix it:
1. Identify the Drain:
* Locate the Evaporator Case: The evaporator is typically located behind the dashboard on the passenger side. Accessing it directly might require partial dashboard disassembly, which is a more involved job. However, you likely don't need to do this.
* Find the Drain Tube: The evaporator case has a drain tube that's usually a small-diameter hose or a groove. This tube carries condensation to the outside of the vehicle. It usually exits somewhere near the firewall, possibly near the passenger side footwell. Try to follow any dampness or water trails to locate it. A flashlight and possibly a mirror will be helpful.
* Check for Clogs: The most common cause is a blockage in this drain tube. Leaves, debris, or even mold can clog it. You might be able to find it by looking up into the footwell or from under the vehicle.
2. Clear the Drain (The Easiest Fix):
* From Inside the Vehicle (If Accessible): If you can locate the drain opening inside the car, use a long, thin, flexible tool (like a coat hanger, shop vacuum hose attachment, or a plumbing snake) to try and clear the blockage. Be gentle to avoid damaging anything.
* From Under the Vehicle (More Likely): Jack up the Jeep securely and support it on jack stands. Locate the drain tube exit point. Carefully inspect it for clogs. Use compressed air (low pressure!), a shop vacuum, or a small amount of water to flush the drain. You might need to use a small brush or pipe cleaner to scrub away any stubborn blockage.
3. Inspect the Drain Tube for Damage:
* Once the drain is clear, check the tube itself for any cracks, holes, or detachments. A broken or disconnected tube is another common cause.
* If damaged, you might be able to repair a small hole with waterproof sealant or replace a section of the tubing with similar-diameter flexible hose. You can find replacement drain tubing at most auto parts stores.
4. Consider the Evaporator Core:
* If cleaning the drain doesn't solve the problem, the evaporator core itself *might* be leaking, though this is less common than a clogged drain. The evaporator is more difficult to access and replacing it would require significant automotive experience or professional help.
5. Other Possible Causes (Less Likely):
* Windshield Seal Leak: While less likely to pool in the passenger footwell specifically, a windshield leak could contribute to dampness.
* Sunroof Drain: A clogged sunroof drain can sometimes cause water to leak inside the vehicle.
Important Notes:
* Safety First: Always disconnect the negative battery terminal before working on any electrical components. Use jack stands properly when working under the vehicle.
* Professional Help: If you're not comfortable working on your car, or if you can't locate the drain or fix the problem yourself after trying these steps, take your Jeep to a qualified mechanic. Improper repair can lead to further damage.
This process focuses on the most likely and easiest-to-fix cause. Systematic checking will help you diagnose the problem and get your Jeep's AC working properly again without water damage.
