Quote:
Originally Posted by Leo_Koneval
Pmohr I need your advice again, the guy I took my car to for the "free" check-up and replacement of faulty parts said that my A/C was warm because I had a leaky valve system.
I was wondering if a valve system was just a bunch of hoses that I could replace or is it something else.
And if so, can I do it myself?
Sorry I didn't search, work in 5 minutes no time to search  Promise I'll search next time before I ask.
Looking forward to your reply! 
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Guess it really depends on what he means by 'valve system'. He could mean the High/Low side hookups for gauges/AC machine. Did he happen to give you a written quote/estimate?
If the valves are leaking, then likely the core just needs to be tightened up (unless it's damaged, then hopefully a replacement would fix it). Leaking out all/most of your refrigerant would be the cause of your warm air.