Sprinkle the ranch packet and gravy packet on top of the beef.
Add the can of cream of mushroom soup and stir to combine.
Stir in the water.
Cover and cook on low for 6 to 8 hours OR 4 to 6 hours on high.
An hour before the end of the cooking time, add the egg noodles and stir, making sure to cover all the egg noodles in the sauce. Cover and continue to cook for the remaining hour.