I went on a call the other day and the complaint was the upstairs system was not cooling as well as the old unit did.
It was a new install and i could not get more than 12 degrees split
I checked and re-checked everything and even charged the system with new refrigerant 410A, I still couldnt get more than a 12 degree split
I got tired of the homeowner looking over my shoulder so i gave him a bucket of pukkie and made him seal his return chase
TXV was good, static pressure was fine on both ends
This was a Amana ASX14O301AB condensor with the factory matched 3 ton evap coil
The coil was huge and I ended up replacing the condensor with a ASX140361AB and BAM welcomed a 18 degree split
The homeowner had puckkie all over his ass when he emerged from his return chase...
I was so happy i popped a wheelie on the way home