Hey fellas. I was working on a 10 year old trane heatpump today. TXV R-22 system. Filters good. Vents open. Compressor was replaced last October (According to owner).
16 Degree delta T @ Gas Furnace. Upflow unit.
Suction Pressure was 80, 5 degrees superheat.
Liquid line pressure was 208 @ 4.5 degrees subcooling. 90 degree ODT
Makes a loud thump when unit turns on after just a second or so. Suspect thats the reversing valve.
I am wondering if the reversing valve is by-passing hot liquid into the low side of the system. So far it is all I can think of that would lower the superheat while raising the suction pressure and lower the head pressure and subcooling.
Thanks in advance.