Air conditioning system in a crossover Nissan Qashqai the second generation (J11) is a complex engineering unit that requires strict adherence to maintenance regulations. Many owners are faced with a situation where the climate control stops cooling the interior, and the first instinctive desire is to refuel themselves. However, without understanding the exact volume and type of refrigerant, you can not only fail to solve the problem, but also destroy an expensive compressor.
For Nissan Qashqai J11, produced since 2014, it is critical to know not only the amount of gas, but also the brand of oil, as well as the type of freon used, since different standards were applied in different years of production. Errors in calculations can lead to water hammer or overheating of the system, which is especially important for cars with Start-Stop, where the compressor operates in enhanced mode.
Types of refrigerants for Nissan Qashqai J11
When servicing the air conditioner on a crossover Nissan Qashqai J11 The first step is to determine which refrigerant is used in your model. Depending on the year of manufacture and the market in which the car was assembled, two main types of freon are used: traditional R134a and modern environmentally friendly R1234yf.
Cars manufactured before mid-2017 mainly use Freon R134a. This is a time-tested gas, equipment for working with which is available in almost any car service center. However, with the introduction of new environmental standards in the European Union and the subsequent transition to them in other regions, more recent specimens Nissan Qashqai began to be equipped with a system based R1234yf.
You can determine the type of refrigerant by looking at the label under the hood or in the service book. It is absolutely impossible to confuse these gases: charging R1234yf into a system containing R134a (and vice versa) will lead to irreversible damage to the seals and compressor, and will also require a complete replacement of all circuit components.
Important: If your vehicle is equipped with Intelligent Key and a modern multimedia complex, there is a high probability of using R1234yf. For older versions without these options, R134a is most often used. Always check the nameplate.
Exact filling volume according to configuration
Refrigerant quantity in the system Nissan Qashqai J11 varies depending on the engine type, the presence of an additional condenser radiator and the type of climate system (single-zone or dual-zone climate control). The standard volume for most gasoline versions with naturally aspirated engines is from 450 to 520 grams.
For engines with a volume of 1.2 liters DIG-T and 1.6 liters, the numbers may differ slightly due to the different layout of the engine compartment and the length of the lines. In cars with a 1.6 dCi diesel engine the volume is often higher as the condenser may be larger to cool the additional equipment.
Below is a table with approximate data on refueling volumes for various modifications of the model:
| Engine modification | Climate control type | Freon type | Refill volume (grams) |
|---|---|---|---|
| 1.2 DIG-T (115 hp) | Single zone | R134a | 480 ± 20 |
| 1.6 (114/130 hp) | Two-zone climate | R134a | 520 ± 20 |
| 1.6 dCi (130 hp) | Two-zone climate | R134a | 540 ± 20 |
| 1.2 DIG-T (from 2017+) | Two-zone climate | R1234yf | 460 ± 15 |
| 1.6 DIG-T (163 hp) | Two-zone climate | R1234yf | 490 ± 15 |
Please note that the values shown are nominal. When carrying out work, the technician must take into account the amount of oil remaining in the system after repairs and adjust the filling. An excess of freon is just as dangerous as a deficiency: it increases the pressure in the circuit, which can lead to rupture of pipes or failure of the magnetic valve.
⚠️ Attention: Using uncalibrated freon cylinders can lead to an error in the filling volume of more than 100 grams. For Nissan Qashqai J11 such an error is critical and requires repeated vacuuming.
Compressor oil and its compatibility
Freon does not work in the air conditioning system Nissan Qashqai J11 on one's own; it needs oil to lubricate the moving parts of the compressor. The type of oil directly depends on the type of refrigerant. For R134a, synthetic oil type is used PAG 46 or PAG 68 (labeling on the container is important).
If the system uses new freon R1234yf, then the oil must be specialized, usually this POE (polyester) or modified PAG with additives. Mixing these oils is unacceptable: they react, forming a sediment that clogs the capillary tube and evaporator.
When completely replacing a compressor or dryer, it is necessary to fill in new oil in the exact volume. Usually this is 100-120 ml, but the exact figure depends on how much oil was drained from the old unit. The remaining oil in the system after partial repair is compensated when refueling.
- 🔧 Use only original Nissan oil or certified analogues (for example, Sanden, Denso).
- 🚫 It is prohibited to mix mineral oils with synthetic PAG/POE oils.
- 🌡️ Check the oil viscosity on the package, it must meet the specification
PAG 46orPAG 68.
- Single-zone climate control
- Dual zone climate control
- I don't know
- Not serviced
Instructions for checking and charging the system
Procedure for refilling the air conditioning system Nissan Qashqai J11 requires professional equipment and adherence to a strict sequence of actions. Self-filling “by eye” or through a pressure manifold without evacuation can end disastrously for the entire system.
The first step is always diagnostics for leaks. If the system has lost freon, there is a hole somewhere. Simply adding gas without fixing the leak is a temporary solution that will not solve the problem and will lead to oil loss and compressor failure.
After eliminating the leak, it is necessary to completely evacuate the system. This removes air and moisture that can cause corrosion and ice formation in the evaporator. The vacuum process should last at least 20-30 minutes for the volume of the system Nissan Qashqai.
☑️ Preparing for refueling
Then the refrigerant is charged in liquid form, if it is R134a, or gaseous, if it is R1234yf (depending on the equipment). Control is carried out using scales: the cylinder is placed on electronic scales, and exactly as many grams are taken as indicated in the documentation.
After refueling, the system is tested for functionality. The compressor should turn on and off at the command of the control unit, and the temperature at the outlet of the baffles should drop to 4-8 degrees Celsius.
What to do if the compressor does not turn on after refueling?
Check pressure sensor, fuses and relays. Sometimes adaptation or error reset via a diagnostic scanner is required.
Common causes of leaks and malfunctions
Even with perfect factory assembly, over time in the system Nissan Qashqai J11 Micro leaks may occur. The most vulnerable places are hose connections, compressor seals and the condenser itself, which is at risk in front of the engine cooling radiator.
A common cause of loss of tightness is corrosion of the aluminum tubes of the evaporator, which is located inside the cabin. Moisture entering through drainage can cause oxidation and the formation of microcracks. In such cases, freon leaves slowly, and the owner notices this only in the complete absence of cold.
Another problem is wear of the compressor seals. Rubber seals become dull and crack over time, especially when used frequently at high temperatures. If you hear a whistling noise when you turn on your air conditioner, it may indicate a leak in that area.
- ❄️ Regularly wash radiators (condenser and evaporator) from dirt and fluff.
- 🛠️ Once every 2-3 years, carry out diagnostics using an ultraviolet lamp to find leaks.
- 🔍 Pay attention to oil stains under the car after parking.
⚠️ Attention: If you notice an oil stain under the hood in the area of the compressor or air conditioning pipes, stop using it immediately. Loss of oil will cause the compressor to seize in a matter of minutes.
System diagnostics and maintenance
For proper air conditioner maintenance Nissan Qashqai J11 it is necessary to use specialized diagnostic scanners capable of reading climate control operating parameters via the vehicle’s CAN bus. Conventional pressure gauges will not give a complete picture, since they will not show the operation of the solenoid valves and the temperature of the evaporator.
Modern refill stations allow you not only to refill freon, but also to analyze its purity, the presence of air and moisture in the system. This is especially important for R1234yf, which is very sensitive to contamination and requires sterility when working.
Periodic refueling without diagnostics is a recipe for disaster. If the system requires regular replenishment of freon, then there is a problem that needs to be found and fixed. Ignoring this fact may cost you to replace the entire circuit, including the expensive compressor and condenser.
Before going to the service center to refill your air conditioning, turn the climate control to maximum and watch how quickly the temperature drops. This will help the technician diagnose the problem faster.
When replacing components, always use original spare parts or high-quality analogues. Cheap Chinese compressors are often poorly built and can quickly fail, as well as clog the system with metal shavings.
Regular diagnostics and repair of leaks is the key to a long life of the compressor and efficient operation of the air conditioner on the Nissan Qashqai J11.
FAQ: Frequently asked questions
How many grams of freon is needed for Nissan Qashqai J11?
The volume depends on the engine type and year of manufacture. For most models this is 480-540 grams of R134a. For new models with eco-gas R1234yf, the volume is 460-490 grams. The exact value is indicated on the plate under the hood.
Is it possible to add freon without vacuuming?
No, this is prohibited. Topping up without evacuation will allow air and moisture to enter the system, which will cause corrosion and failure of the compressor. A full vacuum is always required before refilling.
What type of freon is in the 2015 Nissan Qashqai?
In most cases manufactured in 2015, R134a freon is used. However, if the vehicle was produced for the European market at the end of 2015, R1234yf may be installed. Be sure to check the factory sticker.
Why did the air conditioner stop cooling immediately after refueling?
This could indicate a large leak, a faulty compressor, a clogged filter drier, or problems with the pressure sensors. If refueling does not help, a full system diagnostic is required.
Is it possible to mix R134a and R1234yf?
Absolutely not. Mixing these gases will lead to a chemical reaction, the formation of sediment and complete failure of the system. Replacement of all components and complete flushing of the system is required.
⚠️ Attention: For models with R1234yf freon, be sure to use only specialized equipment, since this gas is flammable and requires special safety measures during operation.