DIY car air con recharge kit: is it legal in the Netherlands?

Online you will find recharge kits with a can of refrigerant and a small pressure gauge. They look like a cheap fix for an air con that has stopped cooling. Here you can read what the European rules say, why a can usually does not solve the cause and what you can do yourself.

By the team at Autobedrijf Willemsbrug, RDW-approved APK (MOT) test station since 1979 · Updated 4 November 2026

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The short answer

No. In the Netherlands and the rest of the EU you may not top up your car’s air con yourself. Under the F-gas Regulation (EU) 2024/573, working on a car air con requires a training attestation or certificate, R134a and R1234yf are only sold to certified people and to companies with certified staff, and disposable cans of these gases are banned, including their use. Have the air con checked by a certified garage, which will first find out why refrigerant has been lost.

Air con service at Autobedrijf Willemsbrug: from € 120 (R134a) or € 180 (R1234yf), ready in 45 to 60 minutes. You can wait for it, on Saturdays too. You can also drop in if we have room: call +31 10 479 00 00 to check. For repairs, we tell you the price in advance. Our team speaks English. More about our air con service

What do the rules say about topping up yourself?

Topping up yourself is not allowed, because three provisions in the European F-gas Regulation (EU) 2024/573 together rule it out. The ANWB (the Dutch motoring organisation) puts it briefly: refilling the air con yourself is not permitted, and it has to be done by an approved company.

Rule What it says What it means for you
Article 10(1) Servicing, maintenance or repair of air conditioning in motor vehicles, and recovering the refrigerant, requires at least a training attestation. This also applies to your own car. Without an attestation or certificate you may not work on the refrigerant circuit.
Article 11(3) Non-refillable containers for gases such as R134a and R1234yf may not be imported, supplied, used or exported. You may not use a disposable can of refrigerant, even if you already have one or bought it abroad.
Article 11(6) These gases may only be sold to certified people and to companies that employ certified staff. As a private person you cannot legally buy R134a or R1234yf.
Directive 2006/40/EC, Article 6(3) A garage may not refill an air con system that has leaked an abnormal amount of refrigerant until the repair has been completed. Even a garage may not top up a leaking air con straight away.

Source: Regulation (EU) 2024/573 on EUR-Lex. More about Directive 2006/40/EC in our article may a garage refill your air con if it leaks (in Dutch).

In the Netherlands, since 7 October 2026, anyone without a certificate needs a training attestation to work on a vehicle air con or to buy refrigerant. This is reported by the government’s Information Point for the Living Environment (IPLO). Existing certificates remain valid until 12 March 2029. The Human Environment and Transport Inspectorate (ILT) enforces the rules. According to IPLO, the fine for working without a certificate is € 1,500 for an individual and € 3,000 for a company.

Why does a can usually not solve the problem?

A can usually does not solve the problem, because the cause remains. An air con is a closed system. If refrigerant is missing, it has either escaped slowly over the years or there is a leak. A can tops it up, but the leak remains. On top of that, there are these risks:

Risk What happens
Too much or too little The small gauge on a can measures the pressure, not the amount. That pressure depends mainly on the temperature. So you do not know how much refrigerant was already in the system. Too much refrigerant gives a high pressure and puts strain on the compressor.
The leak remains The refrigerant escapes again through the same leak. Meanwhile the compressor runs with too little oil, because the oil travels with the refrigerant.
Air and moisture With a can, the system is not put under vacuum. Nissens writes that a poorly evacuated system leaves moisture in the circuit.
Leak sealant Some recharge kits contain a leak sealant (stop leak). According to Nissens, some of these products work by making moisture crystallise. That contaminates the circuit, thickens the oil and can make the compressor seize.
Wrong oil A can with oil or an additive does not suit every system. In an electric car the oil must insulate against electricity. The manufacturer decides which oil belongs in the system.
Unknown gas A can without clear contents may contain a different gas. The refrigerant then becomes mixed, and it has to be clear what is in the system before a garage can recover it.
Pressure and flammability The system is under pressure, and R1234yf is mildly flammable (class A2L). That is why a technician works with equipment made for the job.

Source for leak sealant and moisture: Nissens. The other points are workshop knowledge.

Why the amount matters so much is explained in how much refrigerant is in your car’s air con.

What can you do yourself?

You may not touch the refrigerant, but you can check a few things yourself. That also helps the technician find the cause faster.

  1. Check whether the air con cools. Switch on the air con, set the temperature to the lowest setting and the fan to setting two or three. After a few minutes of driving, the air from the centre vents should be clearly cooler than the outside air.
  2. Listen when you switch it on. With a compressor driven by the engine, you often hear a soft click under the bonnet when it engages. If you hear nothing and the air stays warm, read air con compressor not engaging.
  3. Pay attention to the airflow. If the fan blows weakly, the cabin filter may be clogged. That filter is not part of the refrigerant circuit. On many cars you can replace it yourself, or you can have it done. See cabin filter replacement.
  4. Look in front of the grille. If there are lots of leaves or dirt in front of the condenser, remove them. The condenser needs to get rid of heat.
  5. Find the sticker under the bonnet. It shows whether your car uses R134a or R1234yf. That helps when you call us for a price.
  6. Use the air con even when it is not warm. According to the ANWB, refrigerant slowly escapes from an air con that is not used for a long time.

If the air con cools less well, you still do not know why. It can be too little refrigerant, but also a fan, a sensor or a fuse. Also read car air con not cold or blowing warm air and car air con not working.

Already used a recharge kit? Here is what to do next

Tell us in advance if a recharge kit, a leak sealant or an unknown can has gone into the air con. We need to know before we connect the car to our air con service machine. We then first discuss the safe next step with you.

Is the air con still cooling, but are you unsure whether the amount is right? During an air con service we recover the refrigerant and weigh it. That shows how much was in the system. We then put the system under vacuum and fill it with the specified amount.

Did the air con start blowing warm air again soon after topping up? Then there is almost certainly a leak. We look for that first, with a nitrogen test and UV dye where needed. A nitrogen test mainly finds larger leaks in places that are easy to reach. If a leak is hard to find, we discuss the next step with you. Read more about air con leak detection in Rotterdam.

What does a garage do differently from a can?

A garage does not top up by pressure. It empties the system first and then fills it by weight. The difference in short:

Step Can or recharge kit Air con service at a garage
Recovering and weighing the old refrigerant No Yes
Vacuuming: removing air and moisture No Yes
Checking that the system is sealed No Yes, with a vacuum test and, if in doubt, a nitrogen test
Filling with the specified amount No, it goes by a small pressure gauge Yes, by weight in grams
Oil as specified by the manufacturer Unknown Yes
Allowed No, not for private individuals Yes, by a certified technician

According to the ANWB, an air con service costs about € 150. With us we tell you the price for your car in advance, based on its registration number. What happens during the service is explained on our page about an air con regas in Rotterdam. Everything about our air con service and repairs is on car air conditioning in Rotterdam.

Frequently asked questions

Can I buy a recharge kit abroad and use it in the Netherlands?

No. The F-gas Regulation also bans the use of disposable cans of R134a and R1234yf within the EU. So it makes no difference where you bought the can.

Is a leak sealant a good fix for a leaking air con?

No. According to Nissens, leak sealant can contaminate the circuit, thicken the oil and make the compressor seize. Have the leak found and repaired.

Can I fill the air con with propane or another alternative gas?

No. Propane is flammable and your car’s air con is not designed for it. Only the refrigerant shown on the sticker under the bonnet belongs in your air con, filled by a certified technician.

May a mechanic without a certificate top up my air con?

No. According to IPLO, since 7 October 2026 anyone without a certificate needs a training attestation. Existing certificates remain valid until 12 March 2029. Our technicians hold an F-gas certificate for R134a and R1234yf.

Can I be fined for topping up the air con myself?

Yes. The ILT enforces the F-gas rules. According to IPLO, the fine for working without a certificate is € 1,500 for an individual and € 3,000 for a company.

Am I allowed to replace the cabin filter myself?

Yes. The cabin filter is not part of the refrigerant circuit. On many cars you can replace it yourself. How and when is explained in replacing the cabin filter: when and why (in Dutch).

What is the difference between a top-up and an air con service?

With a top-up, refrigerant is added without knowing how much was already in the system. With an air con service, everything comes out first, the system is put under vacuum and checked, and then it is filled with the specified amount. Garages often call an air con service a regas as well.

Want your air con filled by a certified technician?

Call +31 10 479 00 00 with your registration number. We will tell you which refrigerant your car uses and what the air con service costs.

You will find us at Boterdiep 11 in Rotterdam-IJsselmonde, close to Stadion Feijenoord (De Kuip). We work by appointment. For a quick question or check you can walk in without an appointment.

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