Overheating when turning A/C on interstate on 1999 Ford Expedition

While driving on interstate engine starts to over heat if A\C is turned on
New thermostats 192'
New coolant
Radiator flushed

1 answer 2 comments
POSS FAN CLUTCH OR RADIATOR BLOCKAGE. YOU CAN TEST FAN CLUTCH TOURSELF,WITH ENG RUNNING WATCH FAN CLUTCH IT SHOULD STOP TURNING IN APPROX 3 TO 5 SECONDS IF NOT REPLACE
Thanks for the HELP
your welcome