06-20-2011, 07:02 PM
Read... The... Instructions.
And note.. AC systems are 'closed loop' systems. If you have to add R-134A, it means that sucker has a leak. Which means other bad stuff is happening, EPA, Federal law, ozone layer, yadda yadda yadda.
Most 'top up' kits nowadays include a nice cheap little gage that will tell you if you've got 'enough stuff' in there based on the LOW PRESSURE side. And a safety "Blow out panel" on the can if you accidentally hook it up to the high pressure. Which can still hurt you. So be careful.
And note.. AC systems are 'closed loop' systems. If you have to add R-134A, it means that sucker has a leak. Which means other bad stuff is happening, EPA, Federal law, ozone layer, yadda yadda yadda.
Most 'top up' kits nowadays include a nice cheap little gage that will tell you if you've got 'enough stuff' in there based on the LOW PRESSURE side. And a safety "Blow out panel" on the can if you accidentally hook it up to the high pressure. Which can still hurt you. So be careful.