1994 Honda Accord, daughter's car.  R134

Upon trying to charge, I get the following readings.
Low side 50 psi,
High side cycles between 350 and 450 psi.
Ambient temp = 85°±.

Tried vacuum pump for three hours to remove any moisture, added Freon and
got the same readings as above.

What faulty component prevents the low side from drawing down to a lower
pressure, ergo, cooler air.

Thanks for the education,

Ivan Vegvary