Add the chicken (whole, not diced), soup, chicken broth, carrots, onion, garlic, salt, and pepper to the crockpot. Cook on low for 3 to 4 hours or on high for 2 to 3 hours.
1 1/2 pounds boneless skinless chicken breasts, 21 ounces condensed cream of chicken soup, 3 cups low sodium chicken broth, 2 medium carrots, 2 garlic cloves, 2 teaspoons onion powder, 1 - 1 1/2 teaspoons kosher salt, 1/4 teaspoon black pepper