More Q? After three weeks my installer got back with me. The recommendation from WF was to set the unit to dehumidify mode (reduce fan speed) and see if delta T air side goes up. I was a little surprised but figured why not; let’s see if the laws physics apply to my new unit. So I changed it over (900 to 700CFM) and wow Delta T did go up with lower fan speed, just like they were supposed to, but the unit output is still 70% of SC rated capacity in either normal or dehumidify mode for both stage 1 and 2 @ 46% humidity. A friend recommended that I measured the temperatures of the U bends on the coils with an IR temperature meter. The center 25 U tubes ranged from 15-20°F and had lots of condensation on them, but the bottom 8 U tubes had a temperature of 50-55°F and no condensation on them. The Top 8? (I couldn’t see them well) also had little condensation on them and their temperatures were higher than the center coils. Is this normal? See attached picture. Are the coils broken up into groups? It looked like there were about 40 U bends, if they are broken up into 5 groups of 8 and one is clogged maybe that would explain 20% of the lost 30% of capacity? I’m an electrical guy and don’t know anything about the refrigerant side of things, so laugh all you want. Thanks Rich.