Car Air Conditioning in Ealing
A properly working air con system keeps you cool in summer, clears your windscreen in winter and makes every journey more comfortable. At Auto Workshop, established in 1978, we've been looking after car air conditioning in Ealing from our garage on Elers Road since 1995. From a simple re-gas to fault finding and repairs, we'll keep your system running the way it should, whatever you drive.
How Does Car Air Conditioning Work?
Your car's air con works by moving heat out of the cabin, using a refrigerant gas that circulates around a sealed system. It has a few key parts:
- Compressor. This pressurises the refrigerant and pumps it around the system.
- Condenser. Usually at the front of the car, it releases heat from the refrigerant, turning it from a gas into a liquid.
- Receiver drier or accumulator. This removes moisture and debris to protect the system.
- Expansion valve. This lowers the pressure of the refrigerant so it becomes very cold.
- Evaporator. Behind the dashboard, it absorbs heat and moisture from the air, and a fan blows the cooled, dried air into the cabin.
The refrigerant also carries a special oil that lubricates the compressor and keeps the seals in good condition. That's why regular use and servicing matter so much.
Air Con Servicing and Maintenance
Even a healthy system naturally loses a little refrigerant every year, so it will slowly become less effective. We recommend an air con service around every two years. A service can include:
A full re-gas with the correct refrigerant
A system performance and temperature check
An antibacterial treatment to remove bacteria and the musty smells
Replacing the pollen (cabin) filter, for cleaner air and better airflow
R134a and R1234yf Air Con Re-Gas
There are two main types of refrigerant used in cars:
- R134a is found in most older vehicles.
- R1234yf is the newer, more environmentally friendly gas. It has been used in almost all new cars sold in the UK since 2017, and in many models before that.
The two gases aren't interchangeable, so it's important your car is re-gassed with the right one. We can re-gas both R134a and R1234yf systems. During a re-gas, we remove the old refrigerant, vacuum test the system for leaks, then refill it with the correct amount of fresh refrigerant and oil.
Air Con Diagnostics and Repairs
If your air con isn't blowing cold, is making strange noises or has a bad smell, it's worth getting it checked. Common faults include refrigerant leaks, a failing compressor, a blocked or damaged condenser and electrical faults. Using specialist equipment, including leak detection and car diagnostics, we'll find the cause and explain the best way to fix it.
Use Your Air Con All Year Round
Many drivers only switch the air con on in summer, but running it regularly all year round helps it last longer. Using it for at least 10 minutes every week keeps the oil moving around the system, so the seals stay supple and the compressor stays lubricated. That helps prevent leaks and costly repairs.
Your Air Con Helps in Winter Too
Your air con isn't just for hot days. Because it removes moisture from the air, it's one of the quickest ways to demist your windscreen on cold, damp mornings. A clear screen means better visibility and safer driving, so a well-maintained system is useful all year round.
Air Conditioning for Electric and Hybrid Cars
In an electric or hybrid car, the air con does far more than keep you comfortable. In many EVs, the same system also helps cool the high-voltage battery. Batteries work best within a fairly narrow temperature range, so keeping them cool is vital, especially in hot weather and during rapid charging.
If the cooling system isn't working properly, you may notice slower charging, reduced range or reduced power, as the car protects its battery. Over time, a battery that regularly runs too hot can also wear out faster. That makes regular air con checks just as important as any other part of your EV's servicing.
EV air con systems use an electric compressor and a special non-conductive oil, so they need the right equipment and know-how. Using the wrong oil can damage the system, which is why it's always worth having your EV's air con looked after by a garage that understands electric vehicles.
Why Choose Auto Workshop in Ealing?
Family-run garage
Serving Ealing since 1995, Est. 1978
Honest advice with
no pressure and no unnecessary work
Accredited by The Motor Ombudsman
Trust My Garage approved & RMI member
Genuine OE or equivalent
quality parts for any repairs
Specialist knowledge
of Audi, Volkswagen, SEAT and Skoda
A cost-effective
alternative to main dealers
Car Air Conditioning in Ealing You Can Trust
Trusted since 1978, drivers across Ealing, Northfields and West Ealing have trusted Auto Workshop to keep their cars running at their best. We give honest advice, do careful work and charge fair prices, and we'll only recommend what your car really needs. Whether you need a quick re-gas or a full repair, you're in safe hands. Book your air con service with us today.
How often should car air conditioning be re-gassed?
Most cars benefit from an air con re-gas around every two years. Car air con systems naturally lose a small amount of refrigerant each year, so cooling performance gradually drops over time.
What is the difference between R134a and R1234yf?
R134a is the refrigerant used in most older cars. R1234yf is a newer, more environmentally friendly refrigerant used in almost all new cars sold in the UK since 2017. The two can't be mixed, so your car must be re-gassed with the correct type. Auto Workshop in Ealing re-gasses both.
How do I know which air con gas my car uses?
Most cars have a label under the bonnet showing the refrigerant type. As a general guide, cars registered from 2017 onwards use R1234yf, while most older cars use R134a. We'll always check before re-gassing your car.
Why is my car air con not blowing cold?
The most common cause is low refrigerant, often due to natural loss over time or a small leak. Other causes include a faulty compressor, a blocked condenser or an electrical fault. An air con check will identify the problem.
Why does my car air con smell bad?
A musty or damp smell is usually caused by bacteria and mould building up on the evaporator. An antibacterial treatment and a new pollen filter will usually clear it.
Should I use my car air con in winter?
Yes. Air con removes moisture from the air, so it demists your windscreen quickly on cold, damp days. Using it regularly all year round also keeps the system lubricated and helps prevent leaks.
How long does an air con re-gas take?
An air con re-gas usually takes between an hour and an hour and a half, depending on the vehicle and whether any faults are found.
Do electric and hybrid cars have air conditioning that needs servicing?
Yes. Electric and hybrid cars use air con too, and in many EVs the system also helps manage the temperature of the battery. They need regular checks and re-gassing just like any other car.
Why is air conditioning important for an electric car battery?
In many electric cars, the air con system helps keep the high-voltage battery at the right temperature. If it isn't working properly, the car may charge more slowly or limit power to protect the battery, and the battery can wear out faster over time.