Ticking noise under drivers dash. Happens during start up with a/c on. on 2002 Land Rover Range Rover

stops after 6 or 7 ticks

Asked by for the 2002 Land Rover Range Rover
blend or actuator door sticking or stripped gears
Thanks, Is this a easy fix?
some are easier than others. 3 take approx 1hr to repl and one takes like 5 hrs and parts are approx 280.00 each. by what your saying i think its the easy one on the d/s
Thanks for your help!!