Refrigerant (also known as freon) is compressed in the compressor and turns into a gas. In the condenser, this gas is cooled to a liquid state and travels to the
First, the AC compressor compresses the freon gas making it very hot. Next, the freon travels through a series of coils which helps to cool and convert the gas to a liquid state. It then travels to evaporators which convert it back to a low-pressure freon gas that can cool the air in your home.
Freon will go in the refrigerant lines near the back of your AC unit. Look for small ports with caps on a thin copper line—the Freon goes into those ports. You are best off hiring a licensed HVAC professional who can complete the job safely and correctly.
The condenser removes heat from the hot refrigerant vapor gas vapor until it condenses into a saturated liquid state, a.k.a. condensation. After condensing, the refrigerant is a high-pressure, low-temperature liquid, at which point it's routed to the loop's expansion device.
Refrigerant enters the condenser as high pressure, high temperature vapor. It cools as it the coils come in contact with outside air, cooling into a liquid. So in the condenser, there is both vapor and liquid. In the metering device, refrigerant is fully liquid as it changes from high to low pressure liquid.
It now flows into the outdoor coil, (known as the condenser). Again, as the name suggests, the refrigerant condenses here. As it condenses, it gives up heat to the outside air, which is blown across it by a fan.
The compressor pressurizes the refrigerant gas and sends the refrigerant into the outdoor unit's condenser coil. A large fan pulls outdoor air through the condenser coil, allowing the air to absorb heating energy from the home and release it outside. During this process, the refrigerant is converted back to a liquid.
Most systems need Freon replacement anywhere from once every two to five years from a professional HVAC Contractor. The most significant exception to this rule is when there is a leak in the air conditioning system, which decreases the amount of refrigerant in an AC unit over time.
Hot air from the vents: It might sound counterintuitive, but too much refrigerant can cause hot air. Hot air coming from your vents results from the unit producing excess heat during its operations. The extra power associated with an overcharged system can cause this overheating.
If you find that the smell is in every room but seems to be coming from your vents, then it's a good chance that the smell is Freon.
As mentioned earlier, Freon costs about $125 – $150 per pound. 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.
It's important to remember that, while refrigerant shouldn't run out, it can. The only reason your air conditioner's refrigerant levels might change is if there is a leak in the copper coils or at connection points. This is a serious problem that will keep the AC system from working properly.
You see, refrigerant, a special chemical used to absorb and release heat from the air, is contained within copper coils that travel in a giant loop from your indoor AC unit (the evaporator) to the outdoor AC unit (the condenser). Because the coils run in a closed circuit (see above), refrigerant can't escape.
If the refrigerant level gets low, the air will not be as cold in the passenger compartment. If it gets too low, the low pressure switch will keep the compressor from coming on at all. Low refrigerant levels also promote moisture getting into the system – a sure way to kill the whole thing.
One of the most obvious symptoms of low Freon levels is if your air conditioner is blowing warm or room temperature air. As we discussed, the air conditioning system in your vehicle operates by circulating this pressurized refrigerant. When the amount drops too low, it eventually affects performance.
Depending on the system, the average HVAC lifespan can range from 10 to 20 years. Furnaces, for instance, can have an average life expectancy of 15 to 20 years so it is good to keep the age of your system in mind.
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.
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.
The condenser's main job is to cool down the refrigerant. The condenser coils hold hot refrigerant. Air flows over the condenser coils and heat transfers from the hot condenser coils to the cool air. This heat transfer takes heat away from the refrigerant, so it cools it down.
The main reasons your AC unit outside is not turning on could be something that has tripped the circuit breaker, something is blocking the fan's airflow, or the condensing unit is damaged. Other potential issues could be the thermostat isn't set correctly or the compressor could be malfunctioning.
Replacing an AC condenser is a significant repair, with costs typically ranging from about $2,000 for a small condo to $4,000–$5,000 for a typical two-story home. The biggest cost factor is the size of your home since larger homes require more powerful and expensive units.