Originally Posted by BNSF2228
I need to recharge my A/C system after an O ring crapped out. How much r-134a do I need and is there anything special I need to do when filing it up?
Several cans. But - you NEED to pull a vacuum on that system before you charge it. Leaving even that small amount of atmosphere air in there can creat too high of a head pressure and prematurely wear out the system. You will want gauges and add enough refridgerant to get about a 35 -38 degree coil (low pressure side, blue gauge).
Do it right - or you will do it over, and next time be replacing the compressor and maybe more....
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