What is the average cost to add Freon to AC unit?

Author: Brett Walsh  |  Last update: Saturday, September 20, 2025

The average cost to recharge the Freon levels in an air conditioner unit ranges between $200 and $600. This number can vary, depending on the city you live in, the HVAC provider you choose, and the refrigerant levels in your air conditioner.

How do I know if my AC is low on Freon?

Signs your AC is Low on Freon
  1. It Takes Much Longer Than It Should to Cool Off Your Home.
  2. Your Utility Bills Are Higher Than Usual.
  3. The Air Coming Out of Your Vents Isn't Cold.
  4. Ice Has Started to Build Up on Your Refrigerant Line.
  5. You Hear Loud or Unusual Noises Coming From Your Unit.
  6. Hissing or Bubbling Noise.

Why do HVAC companies charge so much for Freon?

Depending on the type and amount you need, it's likely the cheapest serviceable part of your AC unit. The reason it costs so much is that you need a qualified person to put it in the unit, which takes time and labor, both of which are the expensive parts of the service bill.

Can a homeowner add Freon to AC unit?

If you need refrigerant for your air conditioner, you'll need to contact a professional heating and cooling technician. Under EPA regulations, only a certified professional can recharge your home's HVAC system.

Is it expensive to add Freon to AC?

Residential Air Conditioner Freon Refill Cost

Most homeowners will pay in the range of $200 to $400 for a refill, depending on the type and size of their HVAC unit. If you own a larger r22 unit, you may have to spend $600 or more. To break this down for you, a 25lbs unit of r410A costs anything between $100 and $175.

How much does it cost to charge an air conditioner?

Can you put new Freon in an old AC unit?

If you put the newer freon in right away, your unit will rupture due to the force. However, you can convert your AC unit to handle R410A. You'll need to replace the compressor, condenser, evaporator, and likely the refrigerant tubing. If you replace all of this, your old unit will work fine with the new freon.

How long does Freon last in an AC unit?

Generally speaking, a properly maintained air conditioner can expect its refrigerant to last around 10-15 years or longer—depending on usage frequency and environmental wear and tear. To ensure your refrigerant lasts as long as possible, regular maintenance is key.

How many pounds of Freon does a 3 ton unit hold?

According to PG&E, most central air conditioning systems use two to four pounds of refrigerant per ton of cooling capacity. A three-ton air conditioner would typically have six to 12 pounds of refrigerant for a proper charge.

How to check AC refrigerant level?

Steps for Checking Refrigerant Levels
  1. Turn Off the AC and Remove the Cover. Turn off the AC unit and remove the cover to access the refrigerant level gauge or gauges.
  2. Locate and Remove the Access Panel. ...
  3. Attach Refrigerant Pressure Gauges. ...
  4. Interpret Pressure Levels. ...
  5. Add Refrigerant (if Necessary)

Can AC lose Freon without a leak?

While the refrigerant in your vehicle can escape even without a leak, it's often not enough to cause significant issues unless you've failed to top up the refrigerant for years. When the lack of refrigerant becomes significant though, it can cause a number of problems, including an overheating driver in the summer sun.

Why is AC not blowing cold air?

First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.

Can you replace Freon yourself?

Adding Freon to an AC unit is not a typical DIY project. It requires working with a dangerous chemical, a pressurized tank, and intricate equipment. Any part of the process going wrong can permanently damage your AC unit or cause injury to yourself. Contact a local HVAC professional for this type of service.

Will AutoZone recharge my AC?

An AC leak will lead to warmer air from your vents over time. In most cases this can be fixed with a proven stop leak additive to seal up any leaks. When it's time for an AC recharge, turn to AutoZone.

How much is Freon for an old AC unit?

How Much Does a Freon Refill Cost? Typically, a Freon refill costs anywhere from $100-$350. The amount varies due to several factors, including the size and type of your air conditioning system. The coolant will cost around $75-$175.

Is 4 lbs of Freon a lot?

The amount of Freon your AC system requires depends on several factors, including the size of your home, the type of system, and its specific design. On average, most residential air conditioning systems need between 2 to 4 pounds of refrigerant per ton of cooling capacity.

How much does it cost to refill Freon in AC unit?

A professional AC recharge typically ranges from $150 to $300.

Can I recharge my own home AC?

You need to be aware that if your AC unit uses the CFC type of refrigerant, you will need a licensed AC technician to recharge the system in the United States. It is against the law in the U.S. for anyone not licensed to buy or use ozone-depleting CFC or HCFC refrigerants.

How can you tell if your AC unit needs Freon?

How To Know If AC Is Out of Freon
  1. AC is running, but the home isn't cool. You might feel warm air flowing through the vents, or you might notice that your AC is weaker than it used to be. ...
  2. Ice buildup on refrigerant line. ...
  3. Higher electricity bills. ...
  4. Hissing or bubbling sound from the refrigerant line.

What year did AC units stop using Freon?

The Environmental Protection Agency (EPA) began the phase out of Freon in 1992 when it ordered the ban that took effect in 2020. Because of the long phase-in starting in 2010, new air conditioning, heat pumps, and refrigeration systems stopped using Freon, which is also known as HCFC-22 and R-22.

How often should I add Freon to my AC?

Most ACs nowadays come shipped from the manufacturer with the exact amount of refrigerant that it will need for the duration of its life. So, unlike a car, your AC won't ever need to “fill up” on refrigerant unless something goes wrong with the system.

Do newer AC units still use Freon?

Freon is no longer used in new AC units.

Is it illegal to add Freon to a leaking air conditioner?

So, what happens if you do just add refrigerant to a leaking AC system, or don't get it fixed once the leak is reported? The EPA will fine you. There is no way to sugarcoat this. The fine can be as high as $37,500 per day.

What happens if you put the wrong Freon in AC unit?

Incompatibility Issues: It's essential to replace Freon with an appropriate refrigerant. Choosing the wrong one will damage system components. Avoid Leaks: Minor mistakes made when replacing Freon can cause leaks, impair system cooling efficiency, or result in a complete system failure.

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