In 4-1/2 to 6-quart slow-cooker, add broth, celery, onions, garlic, bay leaves, and thyme.
Then add raw chicken.
Cover slow cooker.
Cook on low 8-10 hours or high 4-5 hours.
Transfer cooked chicken to cutting board. Remove bay leaves from soup.
Add carrot "noodles" to slow-cooker; cover with lid and cook 30 additional minutes.
While carrot "noodles" cook, remove and discard, fat and bones from chicken; chop meat to bite size pieces.
Skim and remove fat from the top of the soup.
Stir chicken back into the soup, and serve.