Take all of the ingredients listed first (except for the roux) and put it all in the crockpot.
Cook on high for 4-5 hours.
Just before time to serve, make the roux by putting the broth in a medium sauce pan. Bring to a low simmer. Slowly add in a little flour. Continue to whisk. Add in a little cornstarch. Continue to whisk. Add in a little heavy cream. Continue to whisk.
Repeat this process until all ingredients for roux are in the pan.
Continue to whisk gently until thoroughly mixed and it is good and thick.
Take off heat and allow to sit for a couple of minutes.
Add the roux into the crockpot and stir. This should thicken up the chowder a bit.
Recipe by A Camera & A Cookbook at https://acameraandacookbook.com/chicken-and-corn-chowder-crockpot/