Thread: Any A/C experts out there?

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OK Guys, based on earlier input I went looking for my expansion valve and for restrictions in the system, and I think I may have found a restriction. On the new hose that runs from the direr to the evaporator on the high side, the 90 degree metal fitting is a smaller diameter than the old hose fitting. The old fitting was 3/8" OD, the new fitting is 5/16" OD and then steps up to 3/8" at the connection point. Is this enough of a difference to cause a problem? The high pressuer side is pushing along through a #6 hose between the drier and evaporator and now has to go through a smaller pipe than before. I think the hose maker used what he had instead of what was actually needed and I did not even notice it when I went to install it because the fitting on the end was still the right size. Thanks again for all your help.

Denny those readings look like what I am looking for with 90 degree ambient, Troy that Vintage Air trouble guide is very helpful. From that I have a restriction, a bad expansion valve or am over charged. The growl and chatter could make me think we have air in the system, but I know it has been well evacuated.

Thanks again

Pat