I needed an R22, 2.5 Ton air handler replacement, goodman said 410a Model ARUF303016CA was compatible so I installed it w/o TxV-Valve and the results were a disaster!
I have about 120psig (70.0F) on the low side and 200psig (100.0F) on the high side, the registers' are approximately 78.0F.
Suction line gets nice and cold but high side is almost at room temperature,
I checked the condenserr fan, its running how it should and the condenser was cleaned recently.
I tried a temporary airflow restriction (cardboard) on the condenser to see if it would affect the head pressure but it didn't.
How can I improve this???
Do I need to change or remove the piston?
Do I need a TXV Valve?