[C320-list] Adler/Barbour (A/B) Fridge Issue

[Cliff Lee]

Our fridge has gone from reasonably good freezing/frosting to just cooling
in the last 2 weeks.  Compressor runs, air-cooled condenser fan is running
and is relatively cool, evaporator is only frosting in perhaps 10% of the
box.  After calling Rob at Domenico (they purchased A/B), I concluded I
needed a refrigerant top-up.  Purged the injection hose, and added some
refrigerant.  I could not keep the compressor suction from going into
vacuum condition (about 10" Mercury).  Gave up (probably added too much).
It is pulling a vacuum all the time now, versus 4-10 psig guideline.  I'm
thinking my evaporator may be blocked or something else restricting
compressor suction.  Suction pressure holds 40-60 psig when not running,
depending on ambient temperature.  Any thoughts would be appreciated, since
my next step is an expensive specialist visit.

Cliff Lee
Comfort Zone
1995 Hull 268