Preheat oven to 350℉.
Combine shredded chicken, cooked and crumbled bacon, diced onion, half the shredded cheese, Ranch seasoning mix, softened cream cheese, and sour cream in a large mixing bowl.
Stir together until well combined.
In a small bowl, stir together the can of red enchilada sauce and heavy cream.
Pour about a ½ cup of the sauce into the bottom of a baking dish. Spread sauce around to cover the bottom of the dish. Set aside while you assemble the enchiladas.
Place flour tortillas between damp paper towels and heat them in the microwave for 10-15 seconds. This will soften them up so they won't crack as you roll them into enchiladas.
Place a flour tortilla on your work surface. Spoon about ⅔ cup of the chicken filling onto one end of the enchilada. Roll the tortilla around the filling.
Place filled tortillas, seam side down, in the prepared baking dish. Continue until all the filling is used up.
Pour remaining sauce over the enchiladas making sure each tortilla is covered with sauce.
Top with a layer of the remaining shredded cheese.
Bake for 40-45 minutes or until the filling is hot and bubbly.
Remove from the oven and allow enchiladas to rest for about 5-10 minutes before serving.