Crockpot Beef Stroganoff

1 1/2 to 2 lb. beef stew meat
1 sm. onion, chopped
1 can cream of onion soup
1 can cream of mushroom
8 oz. cream cheese
8 oz. sour cream
Egg noodles

Combine stew meat, soups, and onion in crockpot and mix well until meat is coated. Cook on low 8 to 10 hours. Before serving, cut cream cheese into cubes; add to crockpot and stir well. Add sour cream, mix well, and let simmer till heated thoroughly. Serve over cooked egg noodles.