[tjenkins]

i just got my a/c charged today cause it was changed to r-134a from the previous owner and when i bought it i had to replace the a/c compressor and like i said i recharged it for the first time since ive owned it and there is no cold air at all it blows air but not cold?

 

[SigEpBlue]

:scratchhe What?

 

[tjenkins]

what im trying to ask is why isnt it blowing cold air?

 

[tnreefguy]

It could be a multitude of problems. Is the compressor even coming on?

 

[tjenkins]

yeah the compressor is coming on while i put freon in it it goes on and off i might just need to put more in it cause it was completly empty

 

[SigEpBlue]

If the system was completely empty to begin with, it had to escape from somewhere. It'd behoove you to find out the location of the leak, and then repair it.

 

[tjenkins]

the system was completly empty cause i had to replace the compressor when you do that the system drains

 

[SigEpBlue]

If the compressor was changed, I can almost say with certainty that the old one died of Black Death. That usually means black goo and metal gets shot through the system. I'd pop the liquid line off the evaporator, and have a darn good look at the orifice tube. Take it out and look at the screen; there shouldn't be any metal or black goo on the screen. If there is, you may have a bit more work ahead of you. In fact, you may want to replace whatever's in there with a RED orifice tube instead of the regular blue tube, since you're using R134a instead of R12.

 

[gocx]

If the compressor was changed, I can almost say with certainty that the old one died of Black Death. That usually means black goo and metal gets shot through the system. I'd pop the liquid line off the evaporator, and have a darn good look at the orifice tube. Take it out and look at the screen; there shouldn't be any metal or black goo on the screen. If there is, you may have a bit more work ahead of you. In fact, you may want to replace whatever's in there with a RED orifice tube instead of the regular blue tube, since you're using R134a instead of R12.

what he said.
and also it could be leaking from anywhere. I had to fix three leaks and replace the compressor before i got mine runnin again

 

[tnreefguy]

If the compressor is turning on and off there is not enough refrigerant in the system to keep the pressure switch made

 

[BroncoBitch]

how are you charging the system? Don't use the low side only charging kits from parts store. You need to know high pressure and low. Having only low side readings doesnt do you any good. How long has it been since it was charged. I would bet most of your o-rings are shot due to lack of lubrication in a system with no refrigerant/oil (mineral oil for R-12). A/C o-rings are super sensitive. A/C systems are complex and can render many problems. The black death is particles from the compressor seals. synthetic materials similar to plastic. You need to properly evacuate your system with this all moisture and air needs to be removed because air and moisture are non-condensables and with enough will cause the evaporator to freeze up which I doubt is your problem. Atleast get a cheap gauge set from harbor and see what high side is doing. Also Hynes has a great book strictly on HVAC at part store that will help u pin-point the issue. If you have had an open system for a while such as a leak then your guarenteed to have a system full of water and air. harbor freight also has an A/C evacuator for 10-15 dollars use air compressor with it.

 

[ScorpionBoy]

harbor freight also has an A/C evacuator for 10-15 dollars use air compressor with it.

has anyone here used one of these to draw down their systems? i heard they suck and you are much better off getting the compressor off of an old fridge and building your own so you can draw it down overnight.