2003 ESCAPE AC WORKS AT STOP BUT BLOWS WARM DRIVING. ANY SUGGESTIOS?

Normally this problem is in the reverse - cools while in motion - but - not while stopped .. That particular set if symptoms would be indicative of an inoperative radiator / air conditioner condenser cooling fan - - insufficient air flow into the engine bay while stopped. This issue is ‘possibly’ resulting from a low refrigerant charge that is allowing the low pressure switch to turn off the a/c compressor as system pressures drop with increased engine rpms.. In any event *hands-on* testing will be required to discover the actual failure. Good luck!