Automotive Air Conditioning Information Forum

Ok, you have all new components.

Obviously the one non OEM part is where the problem is.

The OEM TXV has a pressure reference line that was originally plumbed in to the POA valve. Now it is just plumbed in to an open pipe. The reference signal is no longer right.

I am presuming that the TXV bulb is clamped well to the evaporator line, and the whole assembly is properly insulated from engine heat?

Your blend door is working & sealing well?

POA valves were never considered "rebuildable" . There were never any internal parts for sale. So a "rebuilt" unit is repaired with what? Uh huh.

AMA has been around a long time. They sell a lot of parts, but do not specialize in NOS stuff like other companies. These forums have been around a long time too - recently the very old software became unsupported, and the old posts were archived. Many posters here have been doing this stuff since before that Ranchero was new.

Buy a NOS valve. Get it installed, and while you have the system empty, check the oil level in the crankcase of the York. Pump the system down & charge it.

Post some test pressures when you get it back together.

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I just bought one from ltd nos parts .can you tell me how to adjust ???? I understand from reading of course .you can adjustment is made by turning 7/32nd nut ccw for the setting of 26psi from 31 it said would be r-12 I do not know if this is correct >>>?? and each 1/8 of a turn is 2psi

bohica2xo

We are working on adding a Google search feature to the forum for the archived post.

Thank-you Tim if I end up bying a compressor I will talk to ac kits about it u have been very helpful

Turning the POA 1/4 turn CCW should get you in the ball park for R134A. By the way, what part of Florida are you located?

Ocala center of state 60 miles west from daytoona 60 miles north of Orlando/thanks for all of the help Doug-AND ALSO THANKS bohica2xo

I am onlt 24 miles west of you in Beverly Hills in Citrus County if you need help. i do not charge much. I can set you POA to 26PSI if you need it done. I have a fixture to set them up. I also have a tool to measure the oil in your York compressor. I also can charge that system with R12 and eliminate all of your problems.

HI Doug TODAY I RECIEVED THE POA VALVE , I WILL BE GIVING YOU A CALL /ANDY