Knightrider,

Why would you suggest he replace the orings and not even mention flushing the system.. not logical. If you open it up at all the joints there is no reason not to flush before putting it back together.

Why in the world do you not already have your license ? It is an open book test... I think you will be able to pass it....and if not you can take it again....

I am thinking that if you were required to study or find the answers to the test I might not have to spoon feed you some of the facts about the ( illegal in many states and unnecessarily dangerous ) HC refrigerants . But you can't resist promoting them....while failing to mention the actual drawbacks...it is the failing to present a balanced picture that requires me to post in reply to them... but I have plenty of electrons left in my computer... and I am sure that people will learn more about refrigerants with you promoting them than otherwise...