2004 Lincoln Navigator "air compressor wont pass 20" Questions

compressor and drier assembly (includes vent solenoid) air lines front and rear air spring and shock absorber assemblies four air spring solenoids -----------------------------------------------------

...compressor and fan still blow cold air in this position, would this be some sensor in the fan that needs to be replaced and can it be easily done on my own? I am assuming you mean the fan is only ...