I see two issues here to which I would like to offer comment:

Just because the dealer is the "authorized" service facility does NOT mean that they are the best. There are some excellent independent shops that are better than the dealers. Just because you pay more does not always guarantee more. The difficult thing is finding them. You can start by looking in the "Best Shops" or whatever the name of the forum here and see if there is one recommended in your area. Also ask around and get references about the independent shops.

There are some independents that are rip off artists, but I've seen some dealer shops that could fall into this category.


Secondly, I recommend that you do NOT convert to R134a. Your system is designed for R12. There are horror stories going around that R12 is $80 per can. It is coming down in price due to the fact that many of the older cars requiring it are now being taken off the road. Demand going down means that price is going down. It can now be purchased for about $29 per can with 690 certification.

I would recommend that you search your area for an automotive air conditioning shop. These people are much better equipped and knowledgable. Have them check the system for leaks, repair the leak if there is any, and then recharge with R12. It will probably save you money and your system will cool better AND last longer.

If the a/c shop you find recommends anything other than R12 or R134a, such as Freeze 12, Autofrost, Duracool, etc., don't walk, but RUN away from them. These alternative refrigerants are either blends that present problems in the event of a leak or they are EXPLOSIVE.

Changing to 134 increases the pressures in the system as well as often does not circulate the lubricant through the compressor properly which will lead to failure of components.

My $0.02,