Overheating when idling with the A/C on

Hello, I'm Danny.

Just a quick question first, have you noticed if the electric fans come on? I remember Ford/Lincoln/Mercury had an issue awhile back with the fan relay/module failing causing the fans to not come on. Hope to hear back from you soon. Hope this helps and thanks for using 2CarPros.
Danny-

Hello again.

Yes, that is a possibility. I've attached a picture below of what it looks like. It will be located in a coolant passage.I'll look for a location picture. Thanks again for using 2CarPros.
Danny-

Hello again.

Are you sure your Crown Vic is a 2011 model year? I've attached a picture below of a 2001 in case you entered the wrong year. Can you double check the model year and get back to me? Hope this helps and thanks again for using 2CarPros.
Danny-

Good here is the location and instructions to replace the coolant sensor. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.