Refrigerant in the refrigerator: what gas is used, how to check it and replace

A refrigerator is an indispensable household appliance on which the safety of food and comfort in the home depend. But few people think about what exactly ensures the cold inside the chamber. The main role here is played refrigerant by a special substance that circulates through the system and removes heat. The efficiency of the equipment, noise level, environmental friendliness and even health safety depend on its type.

Modern manufacturers use different types of refrigerants, and their choice is strictly regulated by international standards. For example, old models worked on Freon R12, which is now prohibited due to its harm to the ozone layer. And new refrigerators Samsung, LG or Indesit use environmentally friendly alternatives - R600a (isobutane) or R134a. But how can you understand what gas is pumped into your equipment? And what to do if it leaks? Let's look at it in detail.

What is a refrigerant and how it works in a refrigerator

A refrigerant is a working substance that circulates through a closed circuit of a refrigeration unit, absorbing heat from the chamber and releasing it outside. The process is based on the physical properties of gas: when it evaporates, it absorbs heat, and when it condenses, it releases. In the refrigerator, this cycle is repeated continuously:

1. Evaporation: the liquid refrigerant enters the evaporator (located inside the chamber), where it boils, absorbing heat from the air.
2. Compression: the compressor sucks in gas and compresses it, increasing the temperature and pressure.
3. Condensation: hot gas passes through a condenser (the grill on the back wall of the refrigerator), cools and becomes a liquid again.
4. Expansion: liquid passes through a capillary tube, where the pressure drops and the cycle repeats.

The efficiency of the refrigerator directly depends on the type of refrigerant. For example, R600a (isobutane) has high thermal conductivity, so equipment with it consumes less electricity. A R134a less flammable, but inferior in energy efficiency. Manufacturers choose gas based on the balance between safety, environmental friendliness and cost.

Types of refrigerants in refrigerators: comparison of characteristics

Over the past 30 years, several types of refrigerants have been used in refrigeration technology. Their change is associated with tightening environmental standards and the development of technology. Today, mainly three types of gases are used in household refrigerators:

As can be seen from the table, modern refrigerants (R600a, R290) do not destroy ozone layer (ODP = 0) and have a minimum GWP. However, their main drawback is increased flammability, which requires special care during repairs. For example, R600a lights up at a concentration in the air of 1.3%, and R290 from 2.1%. Therefore, in refrigerators with such gases, sealed systems are used and the amount of refrigerant is limited (usually no more than 150 grams).

What refrigerant is used in refrigerators of different brands

Manufacturers choose the refrigerant based on the design of the refrigerator, the target market and environmental requirements. For example, in Europe and Russia, models with R600aare popular, and in the USA and Asia it is more common R134a. Here are the gases used by leading brands:

• 🔹 Samsung, LG, Indesit, Beko: in 90% of models - R600a (isobutane). The exception is premium series with the system Twin Cooling Plus, where R134a.
• 🔹 Atlant, Biryusa, Nordcan be used: almost all models on R600a. These brands are focused on the Russian market, where isobutane is permitted and certified.
• 🔹 Liebert, Haier (commercial refrigerators): often used R290 (propane) due to its high efficiency in large-sized equipment.
• 🔹 Whirlpool, Electrolux (for the USA/Canada): predominantly R134aas local regulations limit the use of flammable gases in household appliances.

To find out exactly what refrigerant is in your refrigerator, check:

1. The sticker on the compressor (usually the type of gas and its quantity is indicated).
2. Technical data sheet of the device (section "Characteristics" refrigerant").
3. Refrigerator model on the manufacturer's website (in the product card or instructions).

Advantages and disadvantages of popular refrigerants

The choice of refrigerant is always a compromise between efficiency, safety and cost. Let's look at the pros and cons of each option:

R600a (isobutane)

• ✅ Energy efficiency is 10-15% higher than that R134a.
• ✅ Low GWP (3) - minimal impact on the climate.
• ✅ Cheaper to produce and refuel.
• ❌ Fuel: if leaked, can ignite from a spark or open fire.
• ❌ Requires special equipment for refueling (vacuum pump, manifold).

R134a

• ✅ Non-flammable and non-toxic - safe for household use.
• ✅ Compatible with most old systems (can be used instead R12 after modification).
• ❌ High GWP (1430) - prohibited in the EU for new equipment from 2020 year.
• ❌ Less efficient than R600a, so refrigerators consume more electricity.

R290 (propane)

• ✅ Very high energy efficiency (better R600a at 5–8%).
• ✅ Zero ODP and GWP = 3.
• ❌ Even more flammable than isobutane (self-ignition temperature +470°C).
• ❌ Rarely used in household refrigerators due to strict regulations safety.

Signs of a refrigerant leak and what to do

The refrigerant circulates in a sealed system, but may appear over time microcracks in the tubes or damage during transportation. If gas leaks, the refrigerator stops cooling. The main signs of a leak:

• ❄️ The compressor works without stopping, but the chamber is warm.
• 🔥 Oil stains have appeared on the back wall of the refrigerator (the refrigerant washes oil out of the system).
• 💨 A hissing or whistling sound is heard from under the refrigerator (at high leak).
• 🌡️ The temperature in the chamber rises above +10°C, despite the maximum settings.

If you suspect a leak, do not:

⚠️ Attention! Under no circumstances try to solder yourself pipes or refill refrigerant. Flammable gases (R600a, R290) may explode if they come into contact with an open flame (for example, when soldering). Contact the service center!

Algorithm of action in case of a leak:

The cost of repairs depends on the type of gas and the complexity of the leak. For example, refilling R600a is cheaper than refilling R134a, but requires a more thorough check for leaks. On average, the repair price is:

• 🔧 Leak detection + soldering: 3000–6000 rubles.
• 💨 Refrigerant refill: 1500–4000 rubles (depending on the type of gas).
• 🔄 Complete replacement compressor (for critical damage): 8,000–15,000 rubles.

Is it possible to replace the refrigerant in the refrigerator with another type

Theoretically, it is possible to replace one refrigerant with another, but in practice this is associated with a number of difficulties. The main problem is compatibility of oil and system. For example:

• 🛢️ In refrigerators with R134a polyester oil is used (POE), and for R600a mineral oil (MO). They cannot be mixed!
• 🔄 When replacing R12 to R134a the system must be flushed and the filter-drier replaced.
• ⚠️ Replacement of flammable gas (R600a) to non-flammable (R134a) will lead to a drop in efficiency by 20–30%.

The procedure for replacing the refrigerant includes:

1. Pumping out the old gas with a vacuum pump.
2. Rinsing the system with a special solvent (if the oil type is changed).
3. Replacing the filter-drier.
4. Evacuating the system (at least 30 minutes).
5. Refilling the new refrigerant with exact adherence to the dosage.

⚠️ Attention! Replacing the refrigerant yourself without special equipment will lead to compressor failure. For example, if the system is filled with R600a pour in R134a, the compressor will wear out and burn out in 1-2 months.

Is it worth changing the refrigerant? Only in two cases:

1. If the original gas is prohibited (for example, R12), and it cannot be bought legally.
2. If the refrigerator moves to a country with different environmental standards (for example, from Russia to the EU, where R134a is prohibited in new equipment).

The future of refrigerants: what gases will be used in refrigerators

Environmental requirements are becoming more stringent, and manufacturers are looking for alternatives to traditional refrigerants. Since 2020, the EU has a ban on gases with GWP > 150 in household appliances, therefore R134a is gradually being replaced. They are being replaced by:

• 🌿 R600a and R290 —already used, but require improved safety systems.
• ❄️ CO₂ (R744) —natural refrigerant with GWP = 1, but operates at very high pressure (up to 100 bar), which complicates the design.
• 💧 Water (R718) —experimental systems with absorption cycles (used in refrigerators Electrolux for camping).
• 🔬 HFO refrigerants (for example, R1234yf) - synthetic gases with ultra-low GWP, but expensive and still rare in household use technology.

In Russia and the CIS countries, the transition to new refrigerants is slower due to the lack of strict prohibitions. However, some brands are already testing refrigerators for CO₂. For example, Liebherr produces commercial models with R744which are 30% more energy efficient than traditional ones.

What does this mean for the consumer?

• 🔋 New refrigerators will be even more economical (class A+++ will become standard).
• 🌍 An environmentally friendly choice will become a prerequisite when purchasing equipment.
• 💸 Repair of refrigerators for CO₂ or HFO will be more expensive due to the complexity of the systems.

FAQ: Frequent questions about refrigerants in refrigerators

❓ Is it possible to fill the refrigerator with refrigerant yourself?

No. For refilling you need:

• Vacuum pump and manifold.
• Refrigerant cylinder and dosage scales.
• License to work with freons (for flammable gases).

Error in dosage or moisture entering the system will lead to compressor failure.

❓ Why is R600a refrigerant dangerous?

R600a (isobutane) is a flammable gas. If there is a leak, it accumulates at the bottom of the room (heavier than air) and can ignite from:

• Sparks from an outlet or switch.
• Open fire (match, lighter).
• Heated coil of an electrical appliance.

However, in the refrigerator its quantity is minimal (50–150 g), so the risk of explosion is extremely low with working equipment.

❓ Which refrigerant is better: R600a or R134a?

Comparison:

Criteria	R600a	R134a
Energy efficiency	⭐⭐⭐⭐⭐	⭐⭐⭐
Safety	⭐⭐ (flammable)	⭐⭐⭐⭐⭐ (non-flammable)
Environmental friendliness	⭐⭐⭐⭐⭐ (GWP = 3)	⭐ (GWP = 1430)
Repair cost	Low	Medium

Conclusion: R600a wins in efficiency and environmental friendliness, but loses in safety. R134a more reliable for home use, but outdated.

❓ How much refrigerant is in the refrigerator?

The quantity depends on the model and type of gas:

• R600a: 50–150 grams (average 100 g).
• R134a: 100–300 grams.
• R290: 40–120 grams.

The exact amount is indicated on the compressor sticker or in the refrigerator passport.

❓ Can you smell it? refrigerant leak?

Most refrigerants (R134a, R290) are odorless. However:

• R600a may smell of a faint “gassy” aroma (similar to household gas).
• If you smell a strong chemical smell, it is not a refrigerant, but oil or insulationthat decompose when overheated.

If you suspect a leak, ventilate the room and call a technician.