Flogging a dead horse.

[Abe]

Refrigerant:404A
Hot gas defrost.

Upon arriving at job check all coils evap and condenser were clear.
Suction Pressure:15psi
Room temp: -12 degrees c
Suction line temp just before comp -4.4 degrees c.


Reclaimed charge and evacuated.Then weighed in nameplate charge (0.84kg). After weighing in.
Suction Pressure:14psi
Room temp: -14 degrees c
Suction line temp just before comp: -4.3 degrees c.

Any help would be appreciated.

Im thinking on this one
Its not a restriction I dont think
If it was a restriction you would be in vacuum
I know, youre thinking , maybe its a partial vacuum

Your back pressure 15psi is correct
This is my advice

Switch off your evaporator fans
Add refrigerant till the whole evaporator coil is iced
At this point stop adding refrigerant

Make sure your condensor coil is clean

See how it goes