Skip to content
Smart AC Solutions
  • CategoriesExpand
    • AC Troubleshooting
    • Air ConditionerExpand
      • Portable Air Conditioners
      • Room Air Conditioners
      • Split System Air Conditioners
      • Window Air Conditioners
      • Reviews & Prices
    • Thermostat Solutions
    • Calculator
  • Request HVAC Service
  • Join Our Pro NetworkExpand
    • HVAC BusinessesExpand
      • Residential
      • Commercial
      • Emergency Services
    • Add Business
  • Register
  • Login
  • Forgot Password?
Smart AC Solutions
Split System Air Conditioners

Is Your Mitsubishi Mini Split Leaking Water? Here’s The Fixing Guide

ByRalph P. Sita Updated onDecember 23, 2024

Water drips and puddles forming beneath your Mitsubishi Mini Split can signal serious underlying issues with the system. This common problem often stems from condensation forming on chilled evaporator coils, leading to water overflow if not properly addressed. Additionally, blockages in the drain line may cause water backup, contributing to leaks. Understanding and resolving these maintenance mishaps is crucial to maintaining the efficiency and performance of your cooling system.

Page Contents

Toggle
  • Why is My Mitsubishi Mini Split Leaking Water?
  • Why does Water Leak from Mini Splits?
  • Is Leaking From Mini Splits Normal?
  • How to Fix a Leaking Mitsubishi Mini Split?
  • Mini Split Leaking Water Inside
  • Water Leakage From a Brand New Mini Split
  • Water Leakage Inside in LG Mini Split
  • Water Leakage Inside in Mr.Cool Mini Split
  • Next Steps
    • Related Articles

Why is My Mitsubishi Mini Split Leaking Water?

The primary reason for water leakage in Mitsubishi mini split systems often lies in a congested drip pan situated beneath the evaporator coils.

This pan, designed to catch condensed water, overflows when full, resulting in leaks.

Moreover, a blocked drain line can cause water backup and resulting unit leakage.

Why does Water Leak from Mini Splits?

Why does Water Leak from Mini Splits?

Mini-splits may experience water leakage because of a few reasons.

Predominantly, condensation forms on excessively chilled evaporator coils, prompting droplet accumulation and ensuing draining into the pan, causing unit leakage.

Furthermore, blockages in the drain line can induce water backup, while unit damage, frequently from wear or physical damage, can result in leaks because of cracks or holes.

Is Leaking From Mini Splits Normal?

Not necessarily. Infrequent water leakage in mini-splits isn’t necessarily normal.

It could happen due to several reasons. A slightly tilted unit succumbs to gravity’s pull, prompting dripping; rectifying this by leveling the system is often a clear fix.

Alternately, obstructed drainage holes hinder the intended water flow, compelling it to escape from the unit.

Cleaning these passages from any trash or buildup is a recommended step.

How to Fix a Leaking Mitsubishi Mini Split?

Here are the points for your Mitsubishi mini split leaking troubleshooting:

1. Check Evaporator Moisture:

   – Wet evaporator indicates a potential refrigerant leak.

   – Solution: Empty and recharge the system by a professional technician.

2. Inspect Condensate Drain Line:

   – This line expels condensed water from coils during operation.

   – Blockages cause water backup and subsequent unit leakage.

3. Unclog Drain Line:

   – Use a household vacuum cleaner with a hose attachment.

   – Insert the hose into the drain line opening and vacuum out water until cleared.

Mini Split Leaking Water Inside

Addressing water leakage within your mini-split promptly is necessary to prevent additional damage.

Mini Splits, gaining popularity in space-limited homes, efficiently transfer indoor heat outdoors, yet they’re susceptible to issues like leaks.

Potential reasons for indoor leaks include improper installation, manifesting as holes or cracks allowing water entrance.

Another reason may be a clogged condensate drain line, prompting water backup and subsequent indoor leakage.

To tackle installation issues, assess for gaps or cracks around the unit and seal them with appropriate materials like caulk.

For a suspected drain line blockage, clear it using vinegar or blanch.

If these DIY steps fail, seeking professional help becomes important for effective resolution.

Water Leakage From a Brand New Mini Split

It could happen due to various factors. However, the primary reason might be the collection of water in the drain pan.

The water then drips from the evaporator coil. 

Water Leakage From a Brand New Mini Split

Here are the steps in simple points to fix a leaking mini split:

   – Dirty coils can cause leaks.

   – Clean them yourself or hire a professional.

   – A full drain pan might cause leakage.

   – Empty the pan to check if it stops the leak.

   – If DIY steps don’t work, call a professional.

   – They can diagnose and fix the issue efficiently.

Water Leakage Inside in LG Mini Split

If water accumulates inside your LG mini split air conditioner, it’s typically a part of its drainage design.

However, if leakage happens inside, troubleshooting steps can help:

   – Make sure that the drain pan isn’t full; clear any blockages in the drain line caused by debris.

   – If the dish isn’t full and the drain line is clear, frozen coils may be the issue.

   – Turn the air conditioner off for 24 hours to allow coils to defrost. Then, restart the unit and check for leaks.

   – If leaks persist after these checks, professional assistance may be vital for further diagnosis and resolution.

Water Leakage Inside in Mr.Cool Mini Split

Your Mr.Cool mini split leaking water inside can be caused due to different reasons, primarily:

1. Condensation:

   – Normal cooling might cause water to condense on the evaporator coils.

   – Excessive leaks indicate concern, otherwise, it’s typically routine.

2. Overflowing Drain Pan:

– The pan accumulates water from the coils; if full, it prompts leaking.

– Regularly empty the pan to prevent overflow.

If your unit leaks indoors, stay calm and take these steps:

– Identify the source: If from the coils, wipe off excess condensation with a cloth. For pan leaks, empty and completely dry it before repositioning.

These activities can often address minor leaks in your Mr Cool mini-split.

Next Steps

Understanding and addressing water leaks in mini splits ensures efficient functionality.

Regular maintenance, troubleshooting, and professional intervention when needed to ensure optimal performance and a comfortable indoor environment.

5/5 - (1 vote)
Ralph P. Sita
Author: Ralph P. Sita

Ralph P. Sita is a seasoned professional with deep roots in both the HVAC and tech industries. His family’s business, Ralph P. Sita, Inc., is a locally owned and operated HVAC contractor with over 42 years of experience, serving the DC, Maryland, and Virginia areas. The company specializes in residential, commercial, and industrial heating, ventilation, and air conditioning services, offering everything from installation and maintenance to custom ductwork and indoor air quality solutions -www.ralphpsita.com. A former CPA, he spent the last decade as co-founder and co-CEO at Cybrary, a leading platform for cybersecurity and IT training. Cybrary became the largest, most well-known cybersecurity training businesses in the industry under his leadership. Smart AC Solutions is an opportunity to give back to the HVAC community by providing reliable, actionable information on all things heating and cooling.

Related Articles:

  1. Mitsubishi Mini Split Leaking Refrigerant
  2. Mitsubishi Air Conditioner Leaking Water Inside – Troubleshooting Guide
  3. Mitsubishi Mini Split Blinking Green Light [Fixed]
  4. How to Remove Cover on Mitsubishi Mini Split
Ralph P. Sita

Ralph P. Sita is a seasoned professional with deep roots in both the HVAC and tech industries. His family’s business, Ralph P. Sita, Inc., is a locally owned and operated HVAC contractor with over 42 years of experience, serving the DC, Maryland, and Virginia areas. The company specializes in residential, commercial, and industrial heating, ventilation, and air conditioning services, offering everything from installation and maintenance to custom ductwork and indoor air quality solutions -www.ralphpsita.com.

A former CPA, he spent the last decade as co-founder and co-CEO at Cybrary, a leading platform for cybersecurity and IT training. Cybrary became the largest, most well-known cybersecurity training businesses in the industry under his leadership.

Smart AC Solutions is an opportunity to give back to the HVAC community by providing reliable, actionable information on all things heating and cooling.

Linkedin

Try our new Smart AC Solutions GPT

Description of Smart AC Solutions GPT and link to access.

  • The Internet of Things and Your HVAC: A Smart Home Revolution
    by Ralph P. Sita
  • Dual Fuel HVAC Systems: The Best of Both Worlds
    by Ralph P. Sita
  • Optimizing Comfort and Costs: HVAC Zoning for Commercial Spaces
    by Ralph P. Sita
  • HVAC Retrofitting: Upgrading Your System for the 21st Century
    by Ralph P. Sita
  • Beyond Temperature: The Importance of HVAC Humidity Control
    by Ralph P. Sita
  • Modernizing HVAC in Historic Homes: Balancing Efficiency and Preservation
    by Ralph P. Sita

Sites we love:
TrainACE

Facebook Twitter Pinterest YouTube

SmartACSolutions is your go-to source for the latest in heating and air conditioning news, tips, and expert advice.

  • About Us
  • Contact Us
  • Disclaimer
  • Privacy Policy
  • Sitemap

© 2025 Smart AC Solutions । DMCA Protected

SmartACSolutions.com is a property of FieldBin Inc.

Change Location
Find awesome listings near you!
  • Categories
    • AC Troubleshooting
    • Air Conditioner
      • Portable Air Conditioners
      • Room Air Conditioners
      • Split System Air Conditioners
      • Window Air Conditioners
      • Reviews & Prices
    • Thermostat Solutions
    • Calculator
  • Request HVAC Service
  • Join Our Pro Network
    • HVAC Businesses
      • Residential
      • Commercial
      • Emergency Services
    • Add Business
  • Register
  • Login
  • Forgot Password?