When summer arrives and temperatures begin to climb, many drivers discover that their air conditioning isn’t performing quite as well as they remember.

Perhaps the air doesn’t feel as cold as it used to, or maybe the system seems to take much longer to cool the cabin down. For some drivers, the air conditioning stops producing cold air altogether.

One of the first questions we hear at Medway Vehicle Services is:

“Does my car need an air conditioning regas?”

In many cases, the answer is yes.

Air conditioning systems naturally lose refrigerant over time, which means most vehicles will eventually require regassing as part of normal maintenance. However, understanding when a regas is needed and recognising the warning signs can help you avoid discomfort and ensure the system continues operating efficiently.

Written by Medway Vehicle Services Team
Last Updated: June 2026

Quick Answer

Most vehicle manufacturers recommend inspecting the air conditioning system every couple of years.

As a general rule, many vehicles benefit from an air conditioning regas approximately every:

• 2 to 3 years
• depending on vehicle age
• system condition
• annual usage

However, there is no fixed interval that applies to every vehicle.

Some systems continue performing well for longer, while others may require attention sooner if refrigerant loss becomes significant.

Why Air Conditioning Systems Lose Gas

One of the biggest misconceptions surrounding air conditioning systems is that they are completely sealed forever.

In reality, even a healthy system loses a small amount of refrigerant over time.

Air conditioning systems contain numerous components including:

• seals
• hoses
• pipework
• compressors
• condensers

Although these components are designed to contain refrigerant, tiny amounts can gradually escape through normal operation and ageing.

This slow loss is completely normal and is one reason why many vehicles eventually require regassing despite having no faults whatsoever.

It’s similar to how tyres slowly lose pressure over time despite having no punctures.

What Happens When Refrigerant Levels Drop?

Many drivers assume the air conditioning will simply stop working.

In reality, performance usually declines gradually.

Initially, you may notice the system taking longer to cool the vehicle. The air may still feel cold, but not quite as cold as it once did.

As refrigerant levels continue to fall, symptoms often become more noticeable.

Common signs include:

• Reduced cooling performance
• Longer cabin cooling times
• Air that feels cool rather than cold
• Increased strain on the system
• Air conditioning failing to engage properly

At this point, many drivers begin searching for air conditioning regas services.

Why Ignoring Air Conditioning Problems Can Become More Expensive

A regas is often viewed as a comfort-related service rather than a maintenance item.

However, ignoring air conditioning issues for long periods can sometimes create larger problems.

The refrigerant circulating through the system also carries lubricating oil which helps protect internal components, including the compressor.

When refrigerant levels become too low, the system may not operate as efficiently and certain components can experience additional strain.

In our experience, many customers who book a regas early can often avoid the inconvenience of larger air conditioning faults later.

Does Every Lack of Cooling Mean It Needs a Regas?

No.

This is an important distinction.

While low refrigerant is one of the most common causes of poor cooling performance, it isn’t the only possible explanation.

We’ve seen vehicles with cooling issues caused by:

• Leaking condensers
• Faulty compressors
• Electrical faults
• Pressure sensor problems
• Damaged pipework

This is why a professional inspection is always recommended before simply assuming a regas will solve the problem.

In many cases it does, but proper diagnosis helps identify any underlying faults that may need attention.

Can Air Conditioning Still Work If It Needs Regassing?

Yes.

Many systems continue to function even when refrigerant levels have fallen below their optimum level.

This often creates confusion because drivers assume that if cold air is still coming out of the vents, the system must be healthy.

In reality, reduced performance is often one of the earliest warning signs.

We’ve had customers tell us:

“It’s still cold, just not as cold as it used to be.”

That is frequently an indication that refrigerant levels should be checked.

When Should You Book an Air Conditioning Regas?

The best time to think about air conditioning isn’t actually during a heatwave.

Every year we see a surge in enquiries as soon as temperatures rise. Unfortunately, that’s also when many drivers discover their system isn’t working properly.

Booking an inspection before summer arrives can help identify potential issues early and ensure the system is ready when you need it most.

You should consider having your air conditioning checked if:

• Cooling performance has reduced
• The system takes longer to cool the cabin
• It’s been several years since the last regas
• The air no longer feels as cold as before

Air Conditioning Regas Services in Medway

At Medway Vehicle Services, we provide professional air conditioning inspections and regas services for a wide range of vehicles.

If your air conditioning isn’t performing as it should, we can inspect the system, check refrigerant levels and identify whether a regas or further diagnosis is required.

Our goal is always to identify the cause of the problem rather than simply treating the symptom.

Frequently Asked Questions

How often should a car air conditioning system be regassed?

Many vehicles benefit from an air conditioning regas approximately every 2 to 3 years, although requirements vary between vehicles.

How do I know if my car needs a regas?

Common signs include reduced cooling performance, longer cooling times and air that no longer feels as cold as it once did.

Will a regas fix all air conditioning problems?

No. While low refrigerant is a common cause of cooling issues, faults such as leaking condensers, compressors and electrical problems can also affect performance.

Can air conditioning still work if it needs regassing?

Yes. Many systems continue to produce cool air despite operating below their optimum refrigerant level.

Is air conditioning regassing part of an MOT?

No. Air conditioning performance is not typically assessed as part of a standard MOT inspection.

Final Thoughts

Air conditioning systems naturally lose refrigerant over time, which means regassing is a normal part of vehicle maintenance.

The key is recognising the signs early and addressing reduced performance before it becomes a bigger issue.

If your air conditioning isn’t cooling as effectively as it once did, or if it’s been several years since the system was inspected, it may be worth having it checked by a professional.

At Medway Vehicle Services, we help drivers across Medway and Kent keep their air conditioning systems operating efficiently throughout the year.