Thanks Chris, I have spoken to 4 air conditioning companies and they have informed me I have two options, either have RS-24 gass put in in place of the R-12. They said RS-24 was not hightly recomended and two said it can be dangerouse because it is unstable!. Alternativly I can have it converted to R134a for £120+VAT, I was told theat the R-12 oil is not conpatible with R134a but a new additive is availible which converts the oil and makes it compatible with the new gass. Chris you said you have had your aircon regassed, which option did you go for? regards James RG