Why my ac on lowest speed fan temperature is about 48 and at full speed fan 64-8 on 2003 Ford F-150

Ac on low fan speed, gauge read ok on both high and low ports, when fan full speed high port pressure go down (ac compressor is brand new)

1 answer 1 comment
poss blocked condensor.both temps are to high,u may need to seek an insp from your mech
What is that and where is located? Is expensive to fix it?