How Much Does a Coolant Leak Repair Cost on Your Air Conditioner? [2025 Data]

A coolant leak repair costs $1,075 on average, but the total can be as low as $150 or as high as $3,000. Air conditioning coolants used in your home's HVAC system help to cool down the air temperature. While you may not be able to diagnose a leak on your own, your home suddenly taking longer to cool down to a comfortable temperature is a telltale sign. You may also notice hissing sounds, visible leaking, or a mysteriously high energy bill. This guide will show you what to expect for specific repairs.

Coolant Leak Cost Factors

A local HVAC pro may need to spend some time diagnosing the cause of your AC coolant leak. Common leak causes include factory defects, thinned-out connectors and joints, corrosion of copper tubing, incorrect installation, and worn rubber seals. A pro's findings will help to determine costs for parts and labor.

Service Call Fees

Most air conditioning pros charge $75 to $120 for service calls for detecting refrigerant leaks. A service call simply covers the cost to have a professional come out to inspect the issue. Most companies will fold the cost of the service call into your total fee if you decide to accept an estimate.

Labor 

Most air conditioning repair technicians charge between $75 and $150 per hour. A professional should always inform you of their hourly fee before beginning any work during a service call. If you're placing an after-hours call because you need an urgent repair, you may be charged an emergency rate that's closer to $250.

Leak Detection and Testing

In most cases, an air conditioning repair expert will need to conduct testing to determine the source of a leak. Testing options range from rudimentary to highly sophisticated. Here's what you can expect to pay for various leak-detection tests:

Repair Type

After diagnosing your leak, your AC tech will recommend a repair solution. Repair costs can vary based on the age of your system, the seriousness of the damage, and the accessibility of your HVAC components. In addition, you will be charged for any replacement parts that are needed. Here's a look at average costs for common AC coolant leak fixes:

A technician may also charge you for time spent recharging your air conditioning unit after a leak has been repaired. Prior to approving an estimate, you should search your records for all warranty and manufacturer information for your unit. It's possible that parts that are in need of repair or replacement may still be under warranty.

Replacement

If it's determined that your unit cannot be saved, your technician may let you know that you need a full replacement. This can cost anywhere from $500 to $17,000. However, most homeowners can expect a full AC unit replacement to cost around $6,000.

Additional Costs to Consider

The coolant leak repair cost for your project may not stop at simple parts and labor. In cases where your technician needs to do some deconstruction in order to access your leak source, you may need to budget for some extra costs. Additionally, you may need to cover some repair costs if the coolant leak damages any part of your home.

Here are some additional costs to include in your coolant leak repair budget:

• Coolant recharging: AC technicians charge $100–$500 to refill coolant after they repair the leak. 

• Cleaning: If the coolant left a mess behind, expect to spend $4–$5 per square foot for cleanup by a certified AC technician. Never attempt to clean coolant on your own.

• Flooring repair or replacement: Repairing floors affected by the leak will cost $2–$25 per square foot, depending on the flooring type and extent of the damage.

• Drywall repair: If the leak impacted walls near the AC unit, you’ll pay $0.50–$0.75 per square foot for drywall repair, plus $0.75 to $2 per square foot for old drywall disposal.

Cost to Repair an AC Coolant Leak Yourself

It's important to be realistic about the fact that a coolant leak is a serious issue that can potentially be dangerous for your household. You should never attempt dangerous DIY repairs involving Freon™ or electricity. This is why it's highly recommended that homeowners call HVAC professionals to assess leaks before attempting to handle the problem alone.

Coolant leak detection tools can be purchased for between $50 and $100. However, it's important to note that these are not the same high-level tools that professionals use when they show up to your home to detect coolant leaks. The cost for a new compressor is between $500 and $900. Evaporator and condenser coils can cost from $200 to $900.

Why You Should Hire an HVAC Pro

Repairing a coolant leak is a lot trickier than topping off the fluid. Tracking down the source of the leak, handling refrigerant safely, and fixing the right part all require time, tools, and training that most homeowners do not have. DIY can look cheaper at first, but guessing wrong or getting exposed to refrigerant can make the whole situation far more expensive. For safe, accurate work, hire a local AC repair pro.

Here’s why it’s ideal to hire a coolant leak repair pro

Coolant leaks require careful testing and repairs that call for technical know-how and specialized equipment. Working with a licensed expert gives you several clear advantages because they can:

• Identify the source of the leak using tests ranging from bubble checks to advanced electronic sensors

• Handle refrigerants safely to avoid health risks and environmental damage

• Repair or replace components such as coils, compressors, or seals

• Assess warranty coverage to help you avoid unnecessary replacement costs

• Prevent future leaks by addressing system wear, corrosion, or installation issues

If you want to DIY a coolant leak repair

Homeowners can safely handle a short list of supportive steps before the repair person arrives. Here’s what you can realistically take on:

• Check for general symptoms like warm air, longer cooling times, or unusual sounds

• Clean debris around the outdoor condenser to improve airflow

• Replace the air filters to reduce strain on your system

• Gather model numbers, warranty paperwork, and purchase details before your service call

• Clear a path for the technician to access the unit easily

Cost of Common Coolant Leak Repair Add-Ons

After fixing your leak, your air conditioning technician may alert you to the fact the problem was caused by improper unit care. If you're alarmed by how easily a coolant leak can slip under the radar, you may be feeling motivated to start putting some routine AC maintenance on the calendar. Here's a look at some common services to schedule while you're in contact with a repair expert:

• Routine AC unit inspections: $190–$400

• Routine tuneup appointments: $75–$20

• Filter replacements: $20–$50

• Sealant application: $30–$50

Ways You Can Save Money on Coolant Leak Repair Costs

While there aren't many ways to cut corners with coolant leak repair costs, homeowners can reduce project costs with these helpful tips. 

• Prepare the space: Prior to the arrival of your air conditioning tech, clear the area to provide an open workspace. Some companies charge prep costs if they need to clear areas before they can access them.

• DIY easy tasks: If damage needs to be repaired following a leak repair, you can remove damaged drywall, rip up old carpets, or refinish wood floors on your own to cut down on costs. 

• Check for mold: If you know how to check for mold, you could save on the costs for mold inspection. However, you will probably need to pay for professional mold remediation if your AC unit has caused any kind of water damage.

• Check your warranty: Some parts on a newer unit may be covered under your warranty. Always refer to the manufacturer and installation documents that came with your air conditioner or HVAC unit so see if the work being done could be under warranty. This step could save you thousands of dollars.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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