Leaking water from an RV air conditioner can be a frustrating issue for RV owners. As an RV Air Condition supplier, we understand the importance of keeping your RV's cooling system in top-notch condition. In this blog post, we'll walk you through a comprehensive guide on how to troubleshoot an RV air conditioner that is leaking water.
Common Causes of Water Leakage
Clogged Drainage System
One of the most common causes of water leakage in an RV air conditioner is a clogged drainage system. Over time, dirt, dust, and debris can accumulate in the drain pan and the drain tube, preventing water from flowing out properly. This can lead to water overflowing from the drain pan and leaking into the RV.
Improper Installation
If the RV air conditioner is not installed correctly, it can cause water to leak. For example, if the unit is not level, water may not drain properly and can accumulate inside the unit. Additionally, if the seal between the air conditioner and the roof is not tight, water can seep in and cause leakage.
Faulty Evaporator Coils
The evaporator coils in an RV air conditioner are responsible for cooling the air. If these coils are dirty or damaged, they may not function properly, causing water to condense and leak. Dirty coils can also reduce the efficiency of the air conditioner, leading to higher energy consumption.
High Humidity Levels
In areas with high humidity, the air conditioner has to work harder to remove moisture from the air. This can result in more condensation, which may overwhelm the drainage system and cause water to leak.
Troubleshooting Steps
Step 1: Check the Drainage System
The first step in troubleshooting a leaking RV air conditioner is to check the drainage system. Start by locating the drain pan and the drain tube. The drain pan is usually located at the bottom of the air conditioner unit, while the drain tube runs from the drain pan to the outside of the RV.
Inspect the drain pan for any dirt, debris, or standing water. If you find any blockages, carefully remove them using a small brush or a vacuum cleaner. Next, check the drain tube for any kinks, bends, or clogs. If the tube is clogged, you can try using a pipe cleaner or a small wire to clear the blockage. You can also flush the tube with water to ensure that it is clear.
Step 2: Verify the Installation
Make sure that the RV air conditioner is installed correctly and is level. You can use a level tool to check the unit's alignment. If the unit is not level, adjust it accordingly to ensure proper drainage.


Also, inspect the seal between the air conditioner and the roof. Look for any gaps or cracks that may be allowing water to seep in. If you find any issues, you can use a sealant or weatherstripping to repair the seal.
Step 3: Clean the Evaporator Coils
Dirty evaporator coils can cause water leakage and reduce the efficiency of the air conditioner. To clean the coils, first, turn off the power to the air conditioner. Then, remove the access panel to expose the coils.
Use a coil cleaner and a soft brush to gently clean the coils. Be careful not to damage the delicate fins on the coils. After cleaning, rinse the coils with water and let them dry completely before replacing the access panel and turning on the power.
Step 4: Manage Humidity Levels
If you are in an area with high humidity, you can take steps to reduce the moisture in the air. You can use a dehumidifier inside the RV to remove excess moisture. Additionally, make sure to keep the windows and doors closed when the air conditioner is running to prevent humid air from entering the RV.
When to Seek Professional Help
If you have followed all the troubleshooting steps above and the water leakage problem persists, it may be time to seek professional help. A qualified technician from an RV Air Condition supplier like us can diagnose and repair more complex issues, such as a faulty compressor or refrigerant leak.
Our RV Air Condition Products
At our RV Air Condition supply, we offer a wide range of high-quality RV air conditioning units. Our Rooftop Air Conditioner models are designed to provide efficient cooling and reliable performance in various RV settings. Whether you have a small camper or a large motorhome, we have the right air conditioner to meet your needs.
In addition to rooftop units, we also offer Car Air Condition solutions for those who want to keep their vehicles cool and comfortable. Our products are built to last and are backed by our excellent customer service.
Contact Us for Purchase and Consultation
If you are experiencing problems with your RV air conditioner or are looking to purchase a new unit, don't hesitate to contact us. Our team of experts is ready to assist you with any questions you may have and can provide you with professional advice on the best air conditioning solution for your RV. We are committed to helping you keep your RV cool and comfortable on all your adventures.
References
- "RV Maintenance and Repair Handbook"
- "Air Conditioning Technology" textbooks




