1960s 1969 DeVille AC Component Identification

[R Simone]

While my car is down for the engine rebuild I'm gathering parts including new AC Compressor, Receiver/Drier, new lines, etc. etc. In the process of pulling the the engine I broke (line?) attached line to the POA valve and I can't find any information on it in my searches.  Does anyone know what it's called/possible source..?  Thank you

["Cadillac Kid" Greg Surfas 15364]

POA valve. Purpose is to maintain evaporator pressure at 30-32 psig thus eliminating freezing up the coil under reduced load. secondary purpose is oil return under the same reduced loads.
Greg Surfas

[R Simone]

Yes, but it's the small "line" running to the POA that broke (in picture) - Not sure if it's a thermistor or?  Certainly I can replace just that piece instead of the entire POA assembly?

["Cadillac Kid" Greg Surfas 15364]

That is the oil return line from the bottom of the evaporator.  Yes that line itself can be repaired.
Be sure and check the evaporator itself for leaks as well.
Greg Surfas