How Much Does an Air Con Regas Cost?

An air con regas typically costs between £50 and £120 for older cars, while newer vehicles can cost around £80 to £180. The main reason for the difference is the type of refrigerant your car uses.

Most older systems use R134a refrigerant, while newer cars generally use R1234yf, which costs considerably more. You can usually find the correct refrigerant on a sticker under the bonnet or in your vehicle handbook. A garage will also confirm the type before starting the work.

What happens during an air con regas?

A proper air con regas involves more than simply adding extra refrigerant.

First, the machine removes the remaining refrigerant from the system. It then creates a vacuum and checks whether the system can maintain it. This test helps identify leaks before the garage adds expensive new refrigerant.

Once the system passes the test, the machine refills it with the correct amount of refrigerant and lubricating oil specified for your vehicle.

The whole process usually takes around 45 minutes to an hour.

Signs your air con needs regassing

Your car may need an air con regas if:

• The air feels cool rather than properly cold
• The system takes much longer than usual to cool the cabin
• Your windscreen takes longer to demist because the air con helps remove moisture from the cabin
• You notice an unpleasant or musty smell coming from the vents
• You haven’t had the system regassed for two or three years

A musty smell can indicate bacteria building up around the evaporator. An antibacterial air con treatment usually costs around £15 to £30 and can often be completed alongside the regas.

Using your air conditioning regularly throughout winter can also help. Running it every week keeps the compressor seals lubricated and helps maintain the system.

When won’t an air con regas solve the problem?

If your air con starts blowing warm again shortly after a regas, the system could have a leak. In this situation, repeatedly adding more refrigerant won’t solve the underlying problem.

A garage can carry out a leak test using UV dye or electronic detection equipment. Leak detection generally costs around £40 to £90.

The condenser is one common source of leaks because it sits near the front of the car, where stones and road debris can damage it. Replacing an air con condenser can cost roughly £150 to £450 fitted.

At the more expensive end, a failed compressor could cost around £400 to £900 to replace.

Very cheap regas offers can therefore become poor value if the garage doesn’t check the system for leaks first. Always make sure the service includes a proper vacuum and leak check.

Does air conditioning affect your MOT?

Your car’s air conditioning system doesn’t form part of the standard MOT test. As a result, your car can still pass its MOT even if the air con doesn’t work.

However, faulty air conditioning can become an issue when you sell the car. Buyers often check whether the system blows cold, particularly during warmer weather, and a broken system could give them a reason to negotiate the price down.

What affects the cost of an air con regas?

Several factors can change how much you’ll pay.

Refrigerant type: R1234yf generally costs more than the older R134a refrigerant.

System capacity: Larger vehicles can hold more refrigerant, particularly SUVs or cars with additional rear air conditioning. Because garages need to use more gas, the regas may cost more.

Additional treatments: Antibacterial treatments, replacement receiver driers and other extras can increase the final price.

Where you book: Fast-fit chains, independent garages and mobile air con specialists can all charge different rates. Mobile specialists may cost slightly more in some areas, but they offer the convenience of coming to you.

Whichever option you choose, check that the garage carries out a vacuum-and-hold test before refilling the system. This helps confirm that your new refrigerant isn’t immediately going to escape through an existing leak.

Air con regas FAQs

How often should I regas my car’s air con?

Many drivers have their air conditioning regassed every two to three years. You can also wait until you notice the system taking longer to cool the cabin or producing warmer air than usual.

Can I regas my car’s air con myself?

DIY regas kits exist, but they can’t perform the same vacuum and leak checks as professional equipment. A garage can also measure and refill the refrigerant to the correct weight for your vehicle.

Which air con gas does my car use?

Older vehicles generally use R134a, while newer cars typically use R1234yf. Cars produced during the transition period may use either refrigerant. Check the sticker under the bonnet, your vehicle handbook or ask a garage to confirm.

Why does R1234yf cost more?

R1234yf is a newer refrigerant with a much lower global warming potential than R134a. However, the refrigerant itself costs considerably more, which increases the price of a regas.

Does using air conditioning increase fuel consumption?

Yes, running the air conditioning can slightly increase fuel consumption because the engine needs to power the system. However, at higher speeds, using air conditioning can sometimes prove more efficient than driving with the windows open, which increases aerodynamic drag.

Download Rooster and start saving.