Have a r12walkin cooler that started with a condensing fan replacement and a liquid line leak.
Converted to r414b (r12 drop-in) but would not cool below 50'F. Replaced txv with no luck.
Suction pressure running at 52 psi and sh at 10'F. Head pressure running at 150 psi which seems low.
would you think that maybe the compressor is leaking ( valve) and needs to be replaced?