Many kits for topping up your air con / climate control gas are coming onto the market and many see these as a cheap way of topping up the system as the gas degrades over time, and the climate becomes less effective, DO NOT USE THESE KITS AS THEY ARE DANGEROUS and can permanently injure you.
Air con / climate control systems contain two major components, these are the lubricant and refrigerant, and both need replacing, they are measured by weight and introduced to the system when done by professionals. In addition a professional will vacuum your system to remove everything, dispose of it legally and corrretly, and test it before even thinking about introducing the refrigerant gas and lubricant.
Kits work on pressure and not weight, weight is the only sure and certain way of ensuring the correct amount is in the system, and using pressure can introduce more weight of gas then is recommended, this can cause considerable and expensive damage to many parts of the system which could result in a bill for ££££££thousands to repair the damage.
So apart from the dangers of damaging your system, what are the other dangers:
If you come into contact with the refrigerant gas, it will freeze any part of the body it contacts quicker then you can remove it, you cannot see the gas so extensive injuries often requiring amputation wil be done, and if you get the gas into your eyes it will blind you instantly, and both these injuries will be permanent.
What are the costs of these top up gas kits? around £35 from many popular retailers, and this is for just the gas; locally we have air con experts who will vacuum, pressure test, replace refrigerant and lubricant, and introduce a detection dye for any leaks for around £45-50. In addition to this there is the little matter of allowing any refrigerant into the atmosphere being illegal, so you could not only be severely injured, but prosecuted as well, try denying a case in court if you have such injuries, you cannot.