QuestionI have a 1993 jeep cherokee. i am trying to convert to 134 refrigerant instead of freon. I cant get the 134 refrigerant in?? How do i drain or vent the freon from my system?? I am stumped.
AnswerIn order to recover the refrigerant from the system you will need to have access to a recovery machine and someone certified by EPA to do it. Almost every garage has personnel certified. DO NOT just vent it out. After that is done and all the retrofit spec are met (see below) here is how to charge your system back up.
Once all of the old refrigerant is removed, and the EPA steps are taken, here is how you get the refrigerant into the system.
First locate your low pressure switch. You will need to use a jumper wire on this so that your compressor will remain running in order to pull the refrigerant into the system. This switch is usually located on the accumulator(looks like an aluminum can with two lines coming from the top of it) If you do not find it on your accumulator trace your low side line until you come to it. Once you jump it, turn your truck on, turn your A.C. on and charge the refrigerant as a VAPOR into the LOW side of the system until you reach the right low side pressure. (If you need help figuring up the right pressure, message me back with the temperature of where you are doing the work) It differs as the temperature goes up or down. Once you reach your pressure, you are done. It is just that easy when it is done right.
When you are saying convert to 134, what are you changing. In order to do a proper retrofit it involves more than the fittings and the refrigerant. EPA has specific requirements in order for it to be done. If you do not know the requirements, reply to me and I will be more than happy to break them all down to you. FYI: They are getting very very strict with their regulations concerning the clean air act with fines of up to 32,500 dollars per incident.
I hope this information helps you out, if you need more let me know. Thank you for the question.
