R134a pressure question

[Wiseman]

Ok , that’s good info you gave.
I’ll admit that I’m not familiar with KW hvac box . But if heater core and evaporator are in the same box, and use one fan and blending doors, first thing I’ll do is to stop the coolant flow thru heater core and test again. Let stabilize and write numbers . Than put a good size shop fan in front of condenser and write numbers again.
This test will give you fairly clear picture what’s going on .
Let’s see and we’ll go from there.