Having problem with unit. It had the compressor replaced about a year ago and has not cooled properly in a while.
It has dual compressors with dual evap and cond coils, Shared blower and fan. Charge is correct, weighed in to specs, I'm not sure about the metering device because the high pressure gas enters a manifold on the entrance to the evap and it doesn't have a txv valve. Sub-cooling good at 10 deg. but super-heat way off...about 35 deg. back pressure around 55-60 psig. I was thinking, well, guessing that the filter may be loaded but there is no temp diff. across it.
I am a newby to this field and could use some advice....Thanks.