Rob, that hissing noise you're hearing is the high side and low side of your system equalling out because you shut the system off. When you start it up again, your compressor builds the high side back up again. Perfectly normal. If you're leaking, it won't stop hissing (unless it's a very slow leak, then you won't hear it in the first place).

If you have some bad o-rings, you should find some oily residue at one of your hose connections. The worst offender is where the hoses connect to the condensor. Seems that area likes to leak the worst.

 

Rob, I suspect the hissing noise is not the AC. Try this link where I've discussed this before https://www.f150online.com/forums/sh...ighlight=noise. Try the test and see what happens. Please report back.

BTW, I run the AC everyday. Never had a probelm in 6 years. But heck, it was only 86 yesterday.

Joel......

 

WOO HOO

I def do remember hearing it all along, just wanted to make sure
THANKS

Great Link Joel

I'll check it out tomorrow in the light, THANKS

 

Rob, where did you get that valve???

 

Found it in my Fathers Garage, why ?
I bought a conversion kit last year when I had the Jeep and I think it came with it. Auto Zone had them too, but I remembered having one over there so my cheap *** borrowed his

 

being a 2000, and it sits all winter, i was wondering if i had the same problem, where would I get one of those snazzy things. Just wondering if you were able to rent something like that from Autozone or Napa or something

 

I think they're fairly cheap
BUT They now make a can that has the hose and snap coupling RIGHT ON IT
Auto Zone had that today too, but my cheap *** bought the reg one.....

Let me know if you cant get one, I could always lend you mine.

 

Thanks for the "how to" Rob! I'll do it this weekend!

 

In response to this, it doesnt matter with a small bottle of freon which way you hold it. The only reason someone might say to hold it upside down is because in a bottle of freon there is liquid and gas in the bottle and A/C systems have both liquid and gas in the lines. When you flip the bottle it feeds one in or the other. By flipping the bottle you just can make the process move a little faster. This is normally done when charging large systems, not for our L's. Just thought I would share this seeing how you guys help me out everyday and i can finally give a little info back.....even if it isn't that helpful. Thanks!!

 

You shouldn't liquid charge on the lowside with the vehicle running, the compressor can't compress a liquid and you risk damaging it.
Bryan