My 2001 lincoln LS seem to want to overheat when i runs the a/c.but it is fine without the a/c running.

Question

the dealer replace the rad.the term,coolin fan. but still runs hot

Answer 1

==time to take her back to the dealer==and complain=NICELY= if that fails==get nasty==

Answer 2

If you paid the dealer to fix your overheating problem and it's not fixed...take it back and have them check again.Those cars were bad about leaves/debris building up between radiator & condensor blocking air flow.I would think they removed this blockage if they indeed replaced your radiator.