Refrigerators use different cooling technologies and refrigerants. Freon is a refrigerant brand, not the name of every substance used to keep a refrigerator cold. The refrigerant in your appliance depends on its model, age and market.
Check the appliance’s rating label and manufacturer documents for its refrigerant designation. Do not open or puncture the cooling system to find out what is inside.
Which Refrigerants Do Household Refrigerators Use?
You may encounter designations such as R-12 on older equipment, R-134a on other refrigerators, or R-600a, which is isobutane, on newer models. These substances are not interchangeable. Use only the refrigerant specified for the appliance and leave sealed-system work to a qualified refrigeration technician.
Refrigerants differ in their ozone-depletion potential, climate impact, toxicity and flammability. The EPA evaluates these properties separately. Zero ozone-depletion potential does not mean that a refrigerant has no climate or safety concerns.
For example, R-134a does not deplete the ozone layer but has a substantial global-warming potential. R-600a is a hydrocarbon with different environmental properties, but it is flammable and requires equipment and service procedures designed for it.
How Does Refrigerant Cool the Refrigerator?
In a typical compressor refrigerator, refrigerant circulates through a sealed system and carries heat from inside the cabinet to the surrounding room.
As GE explains, the compressor compresses refrigerant vapor. In the condenser, the hot refrigerant releases heat and becomes liquid. A capillary tube meters it into the evaporator, where evaporation absorbs heat. The vapor returns to the compressor and the cycle continues.
The compressor does not itself turn the vapor into liquid. Condensation takes place as heat is released in the condenser.
Recommended Further Reading:
- Does a Refrigerator Require a Fuse?
- Can You Put Your Refrigerator on Side, Back, or Front?
- Consequences of a Wet Refrigerator
Can a Refrigerator Leak Refrigerant?
A sealed refrigeration system can develop a leak if it is damaged or a component fails. Refrigerant is not normally consumed as part of cooling, so a loss needs diagnosis rather than routine topping up.
Poor cooling or longer running times can have several causes. They do not prove that refrigerant is leaking. An unusual smell is not a reliable way to identify the refrigerant or rule out a leak.
Have a qualified refrigeration technician assess a suspected sealed-system problem. Do not remove tubing, add refrigerant, use a flame to search for a leak or spray around electrical and refrigeration components as a home diagnostic test.
Related Further Reading:
- Should Onions be Refrigerated?
- Why Does a Refrigerator Door Shut on Its Own?
- Are Dishwashers Hardwired? [How To Convert Hardwired To Plug-In?]
What Should You Do If You Suspect Exposure?
Do not assume a refrigerant leak is harmless. The risks depend on the substance, the amount released and the surroundings. Some refrigerants are flammable, and a significant exposure can be dangerous.
If someone develops symptoms after a suspected chemical exposure, get away from the affected area and seek urgent help from local emergency services or poison control. MedlinePlus advises immediate medical help for refrigerant poisoning. Do not remain near the refrigerator to investigate the smell or put yourself at risk while helping someone else.
Follow the appliance manufacturer’s leak precautions and keep ignition sources away from a suspected flammable refrigerant release. Leave testing and repair to a technician who is qualified to work with that refrigerant.
Interesting Further Reading:
- How Much Time Needed by a Refrigerator to Cool Down?
- Can The Dishwasher And Disposal Be On The Same Circuit? [Explained]
- Do Refrigerators Feature a Reset Button?
Do RV Refrigerators Use the Same Refrigerant?
RV and portable refrigerators do not all use the same technology. Some use a compressor system, while absorption models use a heat-driven cycle. Dometic describes absorption cooling in which ammonia is part of the cooling process.
Ammonia is not harmless because it contains nitrogen and hydrogen. CDC warns that high levels can injure the skin, eyes and respiratory system, and very high exposure can be fatal. Do not treat an ammonia leak or a refrigerator fire as something you can easily contain yourself.
If an absorption refrigerator is damaged or a leak is suspected, follow its manufacturer instructions and arrange qualified service. If there is a strong chemical release, symptoms, smoke or fire, get away and contact emergency services.
