Cost to add freon to ac unit

When the summer season rolls around and the thermostat rises, the air conditioner becomes the most important system in the house. These hardworking systems keep us cool and comfortable despite the heat, but what do you do if they start to malfunction? 

Here is everything you need to know about how to recharge an A/C unit, as well as signs that it may be time for a replacement. 

What does “recharging your air conditioner” mean?

When you hear someone talking about recharging an A/C unit, they are talking about adding more refrigerant to the unit and ensuring the refrigerant is properly pressurized within the refrigerant system.

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. You should never try to recharge the A/C yourself, even if you have a home air conditioner recharging kit. The refrigerant used can be harmful to you and the environment if it’s not handled properly.

How do I know if my home A/C needs to be recharged? 

There are a couple of ways you’ll know if you need an A/C recharge:

1. Most of the time, when an A/C unit is leaking refrigerant, it will blow warm air. That’s because the refrigerant is no longer there to cool the air passing through your unit. However, your A/C won’t go from cool to warm overnight like it might in the case of a broken thermostat, for example. It will slowly get warmer over time as your unit’s refrigerant leaks, so you’ll notice your air conditioner’s effectiveness diminishing over weeks or months.

2. Another sign that your refrigerant is leaking is ice or frost buildup inside or on the unit. This happens because the refrigerant gas cools everything it touches to the point of freezing—that’s how it cools outside air to pump into your home. When you look inside your unit, it’s normal to see some frosty-looking coiled pipes. Those are your condenser coils, a primary component of the refrigerant system. If everything inside your unit looks frozen, or you’re seeing frost on the outside of the unit, it could be the result of a leak.

How often do you need to recharge your A/C?

The refrigerant systems within A/C units are sealed. This means that home A/C units are designed not to require a recharge unless a leak develops in the refrigerant system. So, unless you notice a problem, a home A/C recharge isn’t needed. 

What does a typical A/C recharge cost?

The cost to recharge a home A/C depends on the cause of the refrigerant leak and refrigerant prices, which are dependent on the unit and your location. The average retail price of refrigerant is $67 per pound, and most units require up to 10 pounds, so your A/C recharge costs could be up to $670.

If extra work is required to repair the cause of the leak, that may be an added expense.

When should I replace my A/C unit? 

You may be better off replacing your leaking air conditioner instead of trying to recharge it—because even the best A/C units don’t last forever. Here are some signs that you may need a new A/C unit: 

• The unit is 15 to 20 years old. 

• The unit is a newer model, but the leak is the result of poor manufacturing.

• The repair cost is almost as much as buying a new unit.

• You’ve had to get the unit repaired frequently.

Learn more about HVAC replacement costs to determine whether or not a replacement will be more cost-effective.

How do I extend the life of my A/C? 

Like any appliance or home system, routine maintenance is the key to extending your air conditioner’s life span. Here are some tips:

However, even with regular maintenance, sometimes parts of your A/C unit will malfunction. When you invest in a home warranty from American Home Shield®, you can rest assured that your budget will be protected in the event of a malfunction of a covered item from everyday wear and tear. Our air conditioner warranty coverage is here to help you if you need an A/C recharge. The ShieldSilver™ and ShieldGold™ plans cover up to $10 per pound of refrigerant, no matter how much you need. ShieldPlatinum™ plan members can enjoy unlimited refrigerant coverage at no additional cost. Check out our pricing and plans for more details and choose the best plan for your household and budget.

These costs are generally not that expensive when considering that this maintenance also extends the life of your compressor, keeping your air conditioning performing optimally season after season.

A professional AC recharge cost ranges from $150 – $300 on average depending on the make and model of your vehicle. Due to refrigerant losses that occur over time, this service is one that should be added to your vehicle maintenance schedule. It is recommended that this service be performed on a vehicle every 100,000 miles or so.

You can save on your this cost by going the DIY route and recharging your car’s AC, in which case you can expect to pay $40-60 for a proper recharge kit. This may seem like a real savings over taking the car into the shop and possibly more convenient, but before proceeding with the DIY alternative, it’s important to understand exactly what’s going on when you get an AC service at a shop, vs doing the job yourself. 

What Does Recharging Your AC Mean?

Servicing your vehicle’s air conditioning system is an expected maintenance item for all vehicles with operational AC. It’s commonly done by dealerships or shops, and it involves hooking your vehicle up to a machine that removes refrigerant from the system, and simultaneously puts the vehicle’s system under vacuum.

This is done to properly test the system for leaks and see if it holds vacuum over a certain period of time. By doing this, the technician is able to detect leaks, and potentially determine their origin. This is important because simply filling the vehicle up with more refrigerant will only be a temporary fix if there is a leak that this new refrigerant can escape through. 

If the system checks out fine for vacuum, the machine recharges the system to the precise amounts of refrigerant needed to operate, and then is checked for proper function. Doing this assures that the compressor works efficiently to deliver the cooling levels required for your specific vehicle make and model.

To do this service yourself, you will need to purchase the recommended refrigerant for your vehicle manufacturer to recharge your system, and to do the service properly, you will need a vacuum pump and manifold gauge set, both available in the AutoZone Loan-A-Tool program. You can learn more about those tools in this article.

 The most common refrigerant for newer model cars is R-134a, which has been the standard since 1994 when cars with R-12 refrigerant weren’t phased out. Many older cars that have never been serviced may use R-12 and need to be retrofitted over to R-134a. Newer vehicles in just the last few years now take a new generation of refrigerant, R-1234yf, which has just become available for DIY use in the last 2 years.

When Should You Recharge Your AC?

The first signs of an AC compressor not functioning properly will be air flow that is warmer than usual when electing the coolest of settings. Air conditioning systems can lose refrigerant in very small doses over time, but rapid leaks are a cause for concern.

It’s important to note, that while simply grabbing a can of refrigerant and charging your system will certainly get your AC working again, it’s vital that you pay attention to the proper pressure of the system and don’t over-charge. Some AC systems, especially newer R-1234yf systems do not take a large amount of refrigerant – some as little as 6oz – and over-charging the system can lead to catastrophic failure. 

If you have successfully charged the system yet weeks later, you feel warm air again, you probably have a leak. Air conditioning systems have several connections in which these leaks can occur, so regular maintenance can help you avoid costly repairs in the future while maintaining optimal cooling throughout the life of your vehicle.

It is expected that at 100,000 miles, your air conditioning system will require servicing. At the first sign of your air conditioning performance not up to par, you should be aware that an AC recharge is probably warranted with an accompanying AC recharge cost. 

Can You Recharge Your Car’s AC?

Recharging your air conditioning system is not a difficult task, but one that requires some research. It is crucial to make sure you know how to recharge it safely and properly. 

First, you will want to confirm the type of refrigerant required for your specific vehicle. If you’ve confirmed that your vehicle uses R-134 or R-1234yf, or has been converted from R-12, you can purchase a recharge kit which will include the recommended refrigerant, dispensable from a pressurized can of approximately 12 ounces to 22 ounces and in most cases will contain a reusable recharge hose outfitted with an inline pressure gauge. This pressure gauge will assure the proper amounts of refrigerant are delivered by measuring existing levels (measured as pressure) and reflecting maximum levels realized for proper recharging. 

Even though most cans do contain a charging hose, using a proper manifold gauge (hose) set is highly recommended and will get you more accurate measurements on your vehicle’s system. Instructions are included within the recharge kit to properly do this service yourself. Next, you will want to identify the low-side delivery point for the refrigerant on your vehicle’s system. Refer to your owner’s manual or online guides for your specific car for this information, or, you can read more about charging your AC system yourself here.

What Happens If You Overcharge Your AC?

When performing this service yourself, you will have the proper recharge kit to guide you in delivering the proper amount of refrigerant into your vehicle’s air conditioning system. However, it is possible to deliver too much refrigerant, resulting in an ‘overcharge’ of the air conditioning system. The result is that your compressor will not be able to provide the proper cooling levels and warm air will be delivered into your vehicle instead. This is why it’s best to tread very carefully when assuming that a non-functioning air conditioning unit is low on refrigerant, as this is not always the case.

f you do over-charge the system, it is best to take the vehicle to a mechanic to have the system properly evacuated by an AC machine, and thus serviced to the correct amount. If you need help performing this, or any AC recharge or service, check out our list of preferred shops in your area that can help. Or, if you’d like to tackle the job yourself, AutoZone has all the tools and refrigerant to service your R-134A or R-12 vehicle.

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