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RV Air Conditioner Dripping Water Outside

Having a functional and efficient air conditioner is crucial for a comfortable and enjoyable RV experience.

However, if you notice water dripping outside your RV air conditioner, it can be concerning and may indicate an underlying issue.

In this article, we will explore the common causes of RV air conditioner water leakage and provide effective solutions to resolve this problem.

Whether you’re a seasoned RV enthusiast or a newbie, this guide will help you troubleshoot and fix the dripping water issue, ensuring a pleasant journey on the road.

RV Air Conditioner Dripping Water Outside

RV air conditioner dripping water outside is a common problem faced by many RV owners.

Water leakage occurs when condensation produced during the cooling process is not properly drained or removed from the unit.

This can result in water accumulating and dripping outside the RV, potentially causing damage to the exterior and inconvenience for the occupants.

If you’ve noticed water dripping outside your RV air conditioner, it’s essential to address the issue promptly to prevent further damage and ensure the optimal performance of your air conditioner.

Here are some possible causes of RV air conditioner dripping water outside:

1. Clogged or Blocked Drainage System

One of the most common reasons for water leakage in an RV air conditioner is a clogged or blocked drainage system.

Over time, dust, dirt, debris, and even mold can accumulate in the drainage channels, hindering the smooth flow of water.

When the drainage system becomes obstructed, the water can overflow and drip outside the RV.

Solution: Cleaning the Drainage System

To resolve this issue, it’s crucial to clean the drainage system regularly.

Here’s a step-by-step guide on how to clean the drainage system of your RV air conditioner:

  1. Turn off the RV air conditioner and disconnect the power supply to ensure safety.
  2. Locate the drainage channels or tubes underneath the air conditioner unit.
  3. Use a soft brush or compressed air to remove any dirt, dust, or debris from the channels.
  4. Check for any signs of mold or mildew and clean them using a mild detergent or vinegar solution.
  5. Rinse the channels thoroughly with clean water and ensure that the water flows freely.
  6. Once the drainage system is clean, reconnect the power supply and test the air conditioner to ensure proper functioning.

Regular maintenance and cleaning of the drainage system can prevent water leakage and prolong the lifespan of your RV air conditioner.

2. Improper Installation

Improper installation of the RV air conditioner can also contribute to water leakage.

If the unit is not installed correctly, it may not be level or securely sealed, allowing water to seep out and drip outside the RV.

Solution: Professional Inspection and Reinstallation

If you suspect that the improper installation is causing the water leakage, it’s advisable to seek professional help.

An experienced RV technician can inspect the installation, ensure proper leveling, and make necessary adjustments or reinstallation to prevent water leakage.

3. Freezing and Thawing

Another potential cause of water leakage in RV air conditioners is the freezing and thawing process.

When the evaporator coils inside the air conditioner freeze due to inadequate airflow or low refrigerant levels, ice can form on the coils.

As the ice melts during the thawing process, excessive water can accumulate and drip outside the RV.

Solution: Ensuring Adequate Airflow

To address freezing and thawing issues, it’s crucial to ensure proper airflow around the RV air conditioner.

Here are some steps you can take:

  • Clean or replace the air filters regularly to maintain proper airflow.
  • Remove any obstructions around the air conditioner unit, such as curtains or furniture, to allow unrestricted airflow.
  • Check the evaporator coils for dirt or debris and clean them if necessary.
  • If the freezing and thawing problem persists, it’s recommended to consult a professional technician who can assess the refrigerant levels and address any underlying issues.

4. Excessive Humidity

High humidity levels inside the RV can also contribute to water leakage from the air conditioner.

When warm air comes into contact with the cold evaporator coils, condensation forms.

If the humidity levels are excessively high, the amount of condensation can exceed the capacity of the drainage system, leading to water leakage.

Solution: Managing Humidity

To manage humidity levels inside your RV and minimize water leakage, consider the following tips:

  • Use dehumidifiers or moisture-absorbing products to reduce excess humidity.
  • Ensure proper ventilation by opening windows or using exhaust fans when cooking or showering.
  • Use insulated curtains or window coverings to reduce temperature differentials and minimize condensation.
  • Regularly check and empty the condensation pan or reservoir to prevent overflow.

By effectively managing humidity levels, you can minimize the chances of water leakage from your RV air conditioner.

5. Damaged or Clogged Condensate Pan

The condensate pan collects the condensation produced by the air conditioner and directs it towards the drainage system.

If the condensate pan is damaged, cracked, or clogged with debris, water can leak outside the RV instead of being properly drained.

Solution: Repair or Replacement of the Condensate Pan

If you suspect that the condensate pan is damaged or clogged, it’s essential to repair or replace it.

Consult a professional RV technician who can assess the condition of the pan and recommend the appropriate course of action.

6. Insufficient Insulation or Seals

Insufficient insulation or seals around the air conditioner unit can contribute to water leakage.

If there are gaps or cracks in the insulation or seals, warm air from outside can enter the unit and mix with the cool air, causing condensation to form and potentially lead to water leakage.

Solution: Check and Seal Insulation

To address this issue, carefully inspect the insulation and seals around the air conditioner unit.

Look for any gaps, cracks, or signs of damage. Use appropriate sealants or insulation materials to fill in the gaps and ensure a tight seal.

This will help prevent warm air infiltration and minimize condensation and water leakage.

Frequently Asked Questions (FAQs):

Why is my RV air conditioner dripping water outside?

There are several possible reasons for your RV air conditioner dripping water outside.

It could be due to a clogged drainage system, improper installation, freezing and thawing, excessive humidity, or damaged condensate pan.

Identifying the specific cause will help you take appropriate measures to resolve the issue.

How can I prevent water leakage from my RV air conditioner?

To prevent water leakage from your RV air conditioner, follow these tips:

  • Regularly clean and maintain the drainage system.
  • Ensure proper installation and leveling of the unit.
  • Maintain adequate airflow around the air conditioner.
  • Manage humidity levels inside your RV.
  • Inspect and repair any damage to the condensate pan.
  • Check for gaps or cracks in insulation and seals and seal them appropriately.

Can I fix the water leakage issue myself, or do I need professional help?

Depending on the severity and complexity of the issue, you may be able to fix the water leakage problem yourself.

Simple tasks like cleaning the drainage system and managing humidity can be done by RV owners.

However, if the issue persists or requires technical expertise, it’s advisable to consult a professional RV technician for assistance.

How often should I clean the drainage system of my RV air conditioner?

It’s recommended to clean the drainage system of your RV air conditioner at least once every three months.

Regular cleaning helps prevent clogs and ensures the smooth flow of water, minimizing the chances of water leakage.

Is water leakage from the RV air conditioner a serious problem?

While water leakage from the RV air conditioner can be concerning, it is not always a serious problem.

However, if left unaddressed, it can cause damage to the exterior of the RV and potentially lead to more significant issues.

It’s important to identify and resolve the cause of the water leakage to maintain the optimal performance of your air conditioner.

Can I use waterproofing sealants to prevent water leakage?

It is not recommended to use waterproofing sealants on the exterior of your RV air conditioner to prevent water leakage.

These sealants can interfere with the proper functioning of the unit and may void the warranty.

It’s best to focus on addressing the underlying causes of water leakage rather than relying on external sealants.


Dealing with water leakage from your RV air conditioner can be frustrating, but with the right knowledge and solutions, you can resolve the issue effectively.

By understanding the common causes of water leakage and implementing the recommended solutions outlined in this article, you can prevent damage, maintain the optimal performance of your RV air conditioner, and enjoy a comfortable and worry-free journey on the road.

Remember to regularly clean and maintain the drainage system, manage humidity levels, ensure proper installation and insulation, and seek professional help when needed.

With these steps, you can keep your RV air conditioner in top shape and avoid the inconvenience of water leakage.