Guys I went to 2 auto parts stores and they have no clue how to get R12 certified.

Does anybody have information on this ?

 

I do my best to make sure no aspect of my cars are either a: legal or b: certified hahaha. Sorry bro.

 

Contact one of your local A/C repair shops. They usually do or know who does the mobile A/C cert training. It's really a bonehead requirement. The class is so basic (Is it: a) okay to release the gas, or; b) not okay to release the gas into the environment) that it can't possibly be of any benefit to the environment. Takes about two hours and they send your test off to the EPA, who sends you your license. I did mine about ten years ago and I doubt things are any different.

 

Here's the exam:

http://www.epatest.com/e_home.html

 

Yep, do a search for "macs". Thay have a similar deal. Open book test with a manual that if you have read, you should be able to ace the test.

 

 

Yeah your local HVAC wholesale parts store will usually sponsor classes and the exam. Give them a call.

 

I just finished taking the test and I passed it..

Very interesting reading in the manual I downloaded.

--> There is no "drop-in" replacement for R12
--> Residual chlorine from any CFC (r12) left in the a/c system will cause serious chemical stability problems in R134a systems.

--> POE and PAG oils which are both used with r134a are not compatible with each other.

--> Recharging a "blend" (freeze12 and hot-shot are 2 examples) is also quite different, you must always recharge as a liquid.

--> Mixing lubricants can cause serious a/c system problems.

--> The proper amount of lubricant is also a very important consideration. If overcharged with lubricant, the system will become oil logged and less efficent, delivering warmer air, or may result in premature compressor failure..
The over the counter r134a conversion kits do not deal with the old oil that is left in your a/c system. So if you put in a new oil and refrigerant load you could easily end up with to much oil. No wonder r134a has a bad reputation

Anyway I learned a few things by taking the time to read the book and take the exam. Well worth the $20 bucks. And the chart on page 29 that shows what the blends are made of is great.

goto page 29 (page 41 in Adobe) and check this out...
http://www.epatest.com/609MAN.pdf