Yesterday I replaced a compressor on a 4 ton Trane heat pump (R22). Compressor had an open winding... anyway the change out went relatively smooth however I was only getting about a 10 degree split at the registers when I was done. Let it run a while and the split went to about 1 degree... WTF? Went back and checked the gauges and had about 95 on low side and 125 on high side. put temp clamp on the reversing valve and got the temps shown in the second pic so I suspect the reversing valve is bad as well.
I don't deal with heat pumps too much so I am looking for a second opinion and maybe an education on troubleshooting reversing valves.. Ambient was about 60 and compressor was pulling about 8-10 amps.