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Car air conditioning regas

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Aircon Regas

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What is an aircon regas?

An aircon regas means removing the old refrigerant from a car's air conditioning system and replacing it with a new one. This in turn helps to improve the car’s air conditioning system because during the air con regas process, a technician will remove the old refrigerant from your car’s air conditioning system and replace it with a fresh one, helping to keep your cabin cooler.

Your car’s AC system is comprised of several components, including:

  • Compressor

  • Condenser

  • Receiver

  • Thermal expansion valve

  • Evaporation coils

The most important part of your car’s air conditioning system is the refrigerant gas, which is often the culprit when things go wrong. 

The refrigerant gas goes into the compressor and turns into a liquid with you turning your aircon on. It meets the air from outside at the condenser, absorbing heat from it.

The liquid then goes through the receiver, which removes any impurities. After that, it reaches the thermal expansion valve, which lets you control the temperature of your AC by manipulating the flow of liquid.

The final step is at the evaporation coils, where the liquid turns back into a gas. In this state, it can absorb the heat from the air passing through the evaporator, leaving behind cool air that the fans can blow into your car.

The refrigerant then travels back to the compressor to start the process all over again.

Your car’s air-conditioning requires regular maintenance just like the rest of the vehicle. It has been recommended that your car’s air conditioning should be taken in for a regas about every two years. Technicians claim that the car permeates around 10-15% of gas from the system each year, even before you have started it. So it makes sense to get your air con regassing booked around the two year mark.

Aircon regas average costs

The cost of an aircon regas is around £66.57 on average when booked with WhoCanFixMyCar.

The exact cost will depend on your car’s make and model. The table below gives you a general idea of the costs for common car makes.

Car MakeAverage Price
Audi£62.43
BMW£67.49
Citroen£60.80
Ford£62.42
Mercedes£63.27
MINI£60.32
Nissan£66.54
Peugeot£65.77
Renault£65.86
Toyota£70.78
Vauxhall£61.17
Volkswagen£67.91
Volvo£59.36

Top warning signs you need an aircon regas

It’s easy to think that the only sign of car aircon trouble is that it won’t blow cold air. However, there are many other symptoms that can indicate the system needs some attention, including: 

  • Damp smell 

  • Water leaks from the system

  • Low air pressure

  • It won’t turn on/off

  • You can’t defog your windscreen

If you notice any of the above, book in for a car aircon service as soon as possible.

  • Car air conditioning regas

    The average cost of an air con re-gas/recharge system booked on WhoCanFixMyCar is from £66.57.

    A car air conditioning re-gas is needed if the system no longer blows cold air or can't defog the windows. An air conditioning re-gas involves replacing the refrigerants in the air-conditioning system.

    Can include
    • Refrigerant removal
    • Refrigerant replacement
    • Replacement micro/pollen filter
  • Car aircon service

    The average cost of a car aircon service booked on WhoCanFixMyCar is £70. If your car’s air conditioning system isn’t functioning to full effect, a car aircon service can help you figure out what’s going wrong. A professional will find the cause of the fault and provide the correct fix to improve its performance.

    Can include
    • Fault diagnosis
    • Car aircon repair
    • Car aircon cleaning
    • Car aircon regas
    • Micro pollen filter replacement
  • Mobile aircon service

    The average cost of a mobile aircon service booked on WhoCanFixMyCar is £66.57. A car air conditioning service involves inspecting the condition and performance of the unit, and performing a regas if the system no longer blows cold air or can't defog the windows. A mobile aircon service involves a mechanic coming to you to check and replace the refrigerants in the air-conditioning system, rather than you visiting a garage.

    Can include
    • Home visit
    • Refrigerant removal
    • Refrigerant replacement

What are the common car aircon problems?

A faulty car air conditioning system might not be the first thing you notice when you get in your car, but keeping it functioning properly is essential. Not only does it keep you cool in the summer and warm in winter, but it also defogs your windscreen and keeps the driver’s view clear. There are a few common problems to keep an eye on when it comes to your car’s aircon.

Which aircon service do you need?

The cost of servicing your aircon will depend on what your air conditioning system requires. To help give you some idea, we’ve listed some common car aircon services and repairs:

  • Aircon regas

A car air conditioning regas is needed if the system no longer blows cold air or can't defog the windows. An aircon regas involves replacing the refrigerant gas, which removes heat from the air pushed through the system and into your car. An aircon regas garage will be able to diagnose and solve the issue for you.

  • Car aircon cleaning

If you notice an unpleasant smell coming from your air conditioning system, it’s a sign you might need it cleaned. Car aircon cleaning removes any bacteria trapped inside the system and prevents mildew. A professional can do a thorough clean of the system without damaging any of the parts.

  • Car aircon service and repair

If your car’s air conditioning system isn’t functioning to full effect, a car aircon service can help you figure out what’s going wrong. A professional will find the cause of the fault and provide the correct fix to improve its performance.

  • Mobile aircon regas service

A car air conditioning service involves inspecting the condition and performance of the unit, and performing an aircon regas if the system no longer blows cold air or can't defog the windows. A mobile aircon service involves a mechanic coming to you to check and replace the refrigerants in the air-conditioning system, rather than you visiting a garage.

How does an aircon regas work?

Car air conditioning regas

Find out about the air conditioning system and some common problems

Car air-conditioning system

How to know when to regas an aircon?

As a general rule, you should regas your car aircon every two years. Experts estimate that you lose around 10-15% of your refrigerant gas per year without even using the system, so it’s essential to keep an eye on this and make sure it’s topped up. It’s a good idea to keep up to date with your annual full service, as a professional will regas your aircon during their checks if your car needs it.

However, if you notice that the system isn’t performing to full effect and struggles to blow air that’s cold enough, that’s the most telling sign that it’s time to book an aircon regas.

Is an aircon regas necessary?

If you don't regas the air-con system, it will become less efficient as time goes on, making the car uncomfortable in hot weather. It will also begin to take longer to demist the windows in winter. It is better to book in an aircon regas every two years, or when you notice any warning signs that it needs attention. You can easily find an aircon regas garage in our network of over 15,000 trusted local garages and mechanics.

Find a mobile mechanic to fix your air conditioning

Sometimes, getting to a garage is an inconvenience. Mobile mechanics can visit you for an aircon regas service.

Mobile mechanics are often cheaper because they don’t have any overheads for their shop or dealership. However, if your problem is specific or needs specialist equipment or machinery, you might find there’s more that can be done at a fully kitted out garage.

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How do you regas your air conditioning?

It’s important to get your car aircon regassed by a professional to ensure it’s done correctly. You can compare prices and book easily online through WhoCanFixMyCar.

How long does aircon regas last?

Aircon gas permeates naturally from the system, and you lose about 10-15% per year. On average, you’ll need a car aircon regas every two years.

Why is my aircon not cold?

An aircon system that can’t blow cold air is the first sign that it needs to be regassed. Getting your aircon refrigerant gas replaced and refilled is the best way to improve the performance of your car’s aircon.

Can I stop the car aircon from smelling?

An aircon system that can’t blow cold air is the first sign that it needs to be regassed. Getting your aircon refrigerant gas replaced and refilled is the best way to improve the performance of your car’s aircon.

What is aircon gas?

The gas in your aircon is refrigerant gas. This absorbs heat from the air outside and allows the system to blow colder air into your car.

When does car aircon need regassing?

Your car’s aircon needs regassing roughly every two years, or if you notice that it has stopped blowing cold air.

Can aircon be fitted to a car?

Most modern vehicles come with aircon built in. However, if yours doesn’t, or you want to upgrade your aircon system, you can get one fitted into your car, but it’s an expensive job and depends on the make and model of the vehicle.

When do I need to service my aircon?

Your aircon will be looked at every year in your full service, but you should also get an aircon regas around every two years.

Can you regas aircon by yourself?

No, it’s essential to get a car aircon regas done by a professional to make sure it’s done correctly and avoid accidental damage to the system.

Can a car aircon leak water?

Your car’s aircon should not leak water, but it’s a common fault that can occur. If you notice a water leak coming from the system, it’s a sign you need to get an aircon repair.