RV AC Leaking Water Inside? Troubleshooting Guide

RV AC water leaks are a common problem faced by most RV owners. Not only is it frustrating, but it can also be costly to repair if left unchecked. Read on if you keep asking yourself, “why is my RV AC leaking water inside?”

RV AC units can leak water inside due to a clogged condensate drain line, improper installation, or a damaged gasket. Condensation may accumulate if airflow is restricted or if the unit is operating in excessively humid conditions. Regular maintenance and ensuring proper drainage can prevent this issue.

In this troubleshooting guide, we’ll explore the common causes of RV AC water leaks and provide comprehensive steps to help you identify and fix the issue. Whether you’re a seasoned RV owner or a new one, this guide is for anyone who wants to avoid the hassle of water leaks in their RV.

Key Takeaways

  • RV AC water leaks are a common problem for most RV owners.
  • Condensation buildup and potential issues with the drainage system are common causes of RV AC water leaks.
  • Maintenance tips and best practices can prevent RV AC water leaks.
  • Temporary solutions can help minimize water damage before you can fix the issue permanently.
  • Seeking professional assistance may be necessary to fix the RV AC water leak.

Common Causes of RV AC Water Leaks

RV AC units are not exempt from water leaks, and identifying the root cause is crucial to fix the problem. The most common cause is condensation buildup, which occurs when the inside of the unit becomes too humid. This moisture then accumulates inside the unit and eventually leaks out.

Another common cause is issues with the drainage system. If the drainage holes of your RV AC unit are blocked or clogged, the water that should be flowing out can accumulate and cause leaks.

It’s essential to troubleshoot RV AC water leaks as soon as possible to prevent further damage to your RV. Here’s how these factors can lead to water leaks inside your RV:

“Water leaks can damage your RV walls, floors, and ceiling and create an environment where mold and mildew can grow.”

If the problem persists, feel free to contact an HVAC technician. They are experts in diagnosing and fixing RV AC water leaks. In the next section, we’ll explain how to troubleshoot the drainage system of your RV AC unit.

Checking the Drainage System

If you have identified a water leak in your RV AC unit, checking the drainage system is a crucial step in troubleshooting the issue. A common cause of RV AC water leaks is a clogged or obstructed drainage system.

To check the system, first, locate the drainage holes on your unit. These holes are usually located towards the back of the air conditioning unit and can be identified as small, circular openings. Make sure to switch off the unit before proceeding with the next steps.

Once you locate the drainage holes, carefully clean them using a soft cloth or brush. Ensure that there is no debris or dirt obstructing the holes to allow proper water flow. Still, air can cause water to collect in your unit, resulting in leaks inside the RV.

If cleaning the drainage system does not fix the water leak, you may require professional assistance to diagnose and fix the issue.

Inspecting the Air Filters

Regularly checking and cleaning the air filters in your RV AC unit is crucial in preventing water leaks. Dirty or clogged filters can impact the cooling process, leading to excess condensation and ultimately causing water leaks inside your RV.

To inspect and clean the air filters:

  1. Turn off the RV AC unit and disconnect the power supply.
  2. Locate the air filters, usually behind the air intake grille on the ceiling or wall.
  3. Remove the air filters from their slot and inspect for dirt, debris, or damage.
  4. Clean the filters and gently wash with warm soapy water. You can also use a soft-bristled brush to remove stubborn debris.
  5. Rinse off the filters with clean water and let them air dry completely.
  6. Reinstall the filters back into their slot and turn the RV AC unit back on.

You should inspect and clean your air filters at least once a month, or more frequently if you’re using the RV AC unit frequently or in a dusty environment

If you notice that the filters are damaged or beyond repair, replace them with new ones as soon as possible. Using a damaged or worn-out filter increases the likelihood of water leaks and can even cause damage to other parts of the RV AC system.

“Routine filter maintenance is the best way to prevent RV AC water leaks and ensure optimal performance of your air conditioning system.”

RV AC Water Leak

Checking for Ice Formation

If you notice water dripping from your RV air conditioner, ice formation inside the unit could be the cause. This is often a sign that the unit is not functioning properly and requires attention. Here’s how to check for ice buildup:

  1. Turn off the AC unit
  2. Open the shroud and look inside the unit
  3. Check for ice formation on the evaporator coils and other surfaces
  4. If you notice ice buildup, let the unit defrost by leaving it off for a few hours
  5. Clean the filters and inspect for other potential causes of ice buildup like low refrigerant levels or poor ventilation

To prevent ice formation in the future, it’s essential to keep your RV AC unit clean and properly maintained. Regularly cleaning filters, checking for proper airflow, and verifying refrigerant levels can help prevent ice buildup and water leaks.

Remember: Ice formation in an RV air conditioner can lead to water leaks and impact the unit’s overall performance. By regularly maintaining your unit, you can address the problem before it causes significant damage.

Evaluating the Seals and Gaskets

Worn-out or damaged seals and gaskets can be a common cause of RV AC water leaks. These components help to seal the AC unit to your RV’s ceiling, preventing water from leaking inside. Over time, the seals and gaskets can dry out, crack, or become damaged due to wear and tear, thus leading to leaks.

To evaluate the seals and gaskets, it is advisable to inspect them regularly, especially after intense rain or prolonged use. You can start by removing the AC unit cover carefully and examining the seals and gaskets for any visible signs of damage. If you detect any cracks or other forms of wear and tear, it is highly recommended to replace them immediately to prevent further water leakage.

Replacing the seals and gaskets involves purchasing the correct replacements from your RV manufacturer or local RV store. Follow the instructions in the AC unit manual or consult an HVAC technician if you are uncertain about the replacement process. Proper installation of new seals and gaskets will ensure a watertight seal and prevent RV AC water leaks in the future.

Maintenance Tips to Prevent Water Leaks

Prevention is key when it comes to avoiding water leaks in your RV air conditioning unit. By implementing these simple maintenance tips, you can help keep your system working smoothly and prevent costly repairs in the future:

  • Regular cleaning: Clean your RV AC unit at least twice a year, or more often if you frequently travel in dusty areas. Use a soft brush to remove dirt and debris from the external vents, and clear any obstructions from inside the unit.
  • Filter replacements: Make sure to replace your AC filters regularly, ideally every 3 months, to ensure proper airflow and prevent condensation buildup. Check the user’s manual for specific recommendations on your unit.
  • Overall system care: Take care of your AC unit by monitoring its performance regularly. Keep an eye out for signs of water leaks or unusual noises, and address them promptly to avoid more extensive damage.

By following these simple maintenance tips, you can minimize the risk of water leaks in your RV air conditioner and ensure a comfortable and dry interior.

RV AC Water Leak Prevention

Seeking Professional Help

If you have tried all the troubleshooting solutions and can’t seem to remedy the RV AC water leak, don’t hesitate to seek professional help. HVAC technicians are trained to identify and fix problems related to RV AC systems, saving you time and frustration.

When considering professional help, keep in mind that the cost of repairs and services may vary depending on the extent of the damage and the complexity of the repair. However, the benefits of professional expertise outweigh the costs, as you’ll be guaranteed a permanent solution to your RV AC water leak problem.

Some signs that indicate you may require professional assistance include extensive water damage, continuous water leakage, and unusual noises or smells from the AC unit. Contacting a professional HVAC technician also saves you the risk of causing further damage to the system due to lack of experience or knowledge.

If you’re unsure about whether to seek professional help, don’t hesitate to reach out and ask for advice. Most HVAC professionals are happy to offer free consultations and advice, guiding you to make informed decisions about your RV AC water leak troubleshooting process.

Benefits of Seeking Professional Help

Benefits Description
Expertise HVAC technicians are trained professionals with experience in diagnosing and fixing RV AC water leaks.
Time-efficiency Professional help saves you time by fixing the issue permanently, reducing the likelihood of future leaks.
Guarantee Most HVAC technicians offer a guarantee for their services, ensuring you get value for your money.
Prevent Further Damage Seeking professional help safeguards you from causing further damage to the system, protecting your RV investment.

Temporary Solutions for RV AC Water Leaks

If you’re experiencing RV AC water leaks and can’t get professional help immediately, there are some temporary solutions to minimize damage and further water leakage.

1. Use a Bucket

If you notice your RV AC unit is dripping water, place a bucket or container under the leaks to collect the water. This will prevent water from damaging your RV’s flooring or furniture.

2. Reduce Humidity

High humidity increases the chance of RV AC water leaks. Use a dehumidifier to reduce humidity levels in your RV and prevent excessive water buildup.

3. Turn Up the Temperature

If your RV AC unit is working too hard to cool your RV, it may be producing too much condensation and leading to water leaks. Turning up the temperature can reduce the workload on the unit and potentially prevent water leaks.

4. Limit AC Usage

Limiting your RV AC usage can reduce the chances of water leaks. Try using fans or opening windows to cool down your RV instead of relying solely on the AC unit.

These temporary solutions can help minimize damage caused by RV AC water leaks until you’re able to fix the issue permanently.


We hope this troubleshooting guide has been helpful in identifying and fixing RV AC water leaks. Remember to regularly check and maintain your RV AC unit to prevent future water leaks and ensure optimal cooling performance.

By following the steps outlined in this article, you can save time and money by addressing RV AC water leaks on your own. However, if you encounter any challenges, seek the assistance of qualified HVAC technicians to resolve the issue.

Don’t let water leaks ruin your RV experience! Instead, use this guide to keep your RV interior dry and comfortable during your adventures.


How can I troubleshoot an RV AC water leak?

To troubleshoot an RV AC water leak, you can start by checking the drainage system, cleaning the drain holes, and ensuring proper water flow. Inspecting and cleaning the air filters is also essential to prevent water leaks. Additionally, checking for ice formation and evaluating the seals and gaskets can help identify potential sources of the leak. Following regular maintenance tips and seeking professional help when needed are other recommended steps to address and prevent RV AC water leaks.

How do I check the drainage system of my RV AC unit?

To check the drainage system of your RV AC unit, locate the drain holes on the unit’s underside. Clean the holes using a soft brush or pipe cleaner to remove any debris or blockages. You can also use a mix of water and vinegar to flush out the drainage line. Regularly cleaning the drainage system helps maintain proper water flow and prevents leaks inside your RV.

Why should I inspect and clean the air filters in my RV AC unit?

Inspecting and cleaning the air filters in your RV AC unit is essential because dirty or clogged filters can restrict airflow and affect the cooling process. When airflow is restricted, condensation can build up and cause water leaks inside your RV. By regularly cleaning and replacing the air filters, you ensure proper cooling and minimize the risk of water leaks.

How do I check for ice formation in my RV AC unit?

To check for ice formation in your RV AC unit, turn off the unit and let it defrost completely. Inspect the evaporator coils for any visible ice buildup. If ice formation is present, it indicates an issue with the cooling process, which can lead to water leaks. Ensure proper ventilation, clean the filters, and consider reducing the thermostat temperature to prevent future ice formation and water leaks.

How do worn-out seals and gaskets contribute to RV AC water leaks?

Worn-out seals and gaskets in your RV AC unit can create gaps or cracks, allowing water to escape and leak inside your RV. Inspecting these components and replacing them when necessary is crucial to prevent water leaks. By ensuring a proper seal, you maintain the integrity of your AC unit and prevent water intrusion.

What are some maintenance tips to prevent RV AC water leaks?

To prevent RV AC water leaks, it is essential to follow a few maintenance tips. Regularly clean and replace the air filters, check and clean the drainage system, and ensure proper ventilation around the unit. Additionally, keeping the RV interior dry by using dehumidifiers and opening windows to improve airflow can help prevent condensation and water leaks.

When should I seek professional help for an RV AC water leak?

If you have tried troubleshooting the RV AC water leak but are still unable to identify or fix the issue, it is advisable to seek professional help. HVAC technicians have the expertise and tools to diagnose and repair complex problems with your RV AC unit. Additionally, if your RV is still under warranty, contacting a professional ensures that the repairs are done correctly and do not void the warranty.

What are some temporary solutions for RV AC water leaks?

If you encounter an RV AC water leak and cannot fix it immediately, there are some temporary solutions to mitigate the damage. You can place buckets or towels to catch the water, use portable dehumidifiers to reduce moisture, and ensure proper ventilation inside the RV. However, it is important to address the root cause of the water leak as soon as possible to prevent further damage and mold growth.

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