Why does my Air Conditioning need servicing?

Frequently Asked Questions

Why do I need to have my A/C system serviced?

All vehicle air conditioning systems leak to a lesser or greater degree. The losses occur when refrigerant escapes through the pipe joins as a result of vibration and ageing of rubber hoses and 'O' ring seals, as well as through the seal on the front of the compressor shaft.

Why does my fridge at home not need servicing every twelve months?

A domestic fridge has no rubber pipes and no seal on the front of the compressor shaft; all piping is copper therefore there is no leaking through pipe walls.

Is it true that my Air Conditioning system should be run often throughout the year?

Yes, this helps to keep the system well lubricated and leak tight.


Because the refrigerant actually carries the oil that lubricates the system, most importantly the compressor. It also keeps the seals and hoses moist, thus preventing them from drying out and cracking leading to leaks.

Why is looking after the compressor so critical?

This is the main component in the A/C system, replacements typically cost £300 - £700, plus labour costs to remove and replace. Also it usually follows that a seized compressor will result in other components getting damaged in the process.

Why can't I service the system myself?

This is difficult not only because specialist equipment is needed but most importantly the refrigerant present in the system must be recovered.

It is ILLEGAL to vent the refrigerant into the environment. The system is also under high pressure and needs pulling into a deep vacuum to remove any moisture. The refrigerants themselves have a very low boiling point and will cause freeze burns if they come into contact with skin or eye tissue.

You have been warned!!!

Why put Ultra Violet (UV) dye in the system?

The UV dye shows up under a bright UV light source. So any leaks present in the system can be easily identified either during fault finding or if future leaks were to develop.

Why use Nitrogen for leak testing?

We use Oxygen Free Nitrogen (OFN) for leak testing. It would be illegal to re-gas a system to use the refrigerant as a means of leak detection. The pure form of Nitrogen is a naturally occurring gas in the air that we breath and so is safe and legal to use. The Nitrogen is inserted into the system under high pressure thus simulating a system in operation and revealing any leaks in the system.

Why should my gas be analyzed?

Our gas analyzer can reveal whether or not your gas is the correct type for your vehicle air conditioning system and whether or not it is contaminated which would strongly suggest a leak in the system. The wrong type of refrigerant could also bring about the premature failure of the compressor as it may not be able to carry the essential lubrication around the system.