Quote:
Originally Posted by leathermang
What kind of hissing are you people talking about ?
The TXvalve is designed to HISS.... it is spraying liquid refrigerant into the inside of the evaporator ... this is THE PHASE CHANGE which is HOW the AC works.....
Are any of you suggesting the hissing is releasing refrigerant into the Atmosphere ?
That is not supposed to happen...
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Last year when the AC was working well, I heard a short hiss when the AC went on and nothing more. Now it's hissing continuously and when I charged it up the other day and got cold air from the vents there was very little hissing.
To give a little more detail on what happened over the last 6 weeks; after changing my expansion valve and drier with switches, I had the system leak tested with gas at a local shop. The mechanic said that my manifold hoses were leaking and and that the leak on my R4 compressor was excessive. I had the front shaft seal replaced on the compressor. I put 7 ounces of PAO68 oil into the system and lubed all of my fittings and new seals with PAO68. I didn't have the system flushed, just had vacuum pulled on it for a couple of hours.The PAO68 has UV dye in it, so I can buy a black light and search for a leak. Like I said in my most recent post, the AC felt pretty good right after putting in 42oz. of R12.