Will sour cream curdle in crock pot?
Adding milk, cream, cheese, sour cream, or yogurt to a slow cooker will curdle them.
Prolonged cooking of dairy products causes them to separate. Adding milk, cream or yogurt to crockpots at the beginning of cooking is a sure-fire way to wind-up with a grainy, watery mess at the end. Stir it in once the recipe has finished cooking.
The lesser fat content of sour cream makes it less versatile for cooking—while crème fraîche can be boiled, sour cream will curdle if heated too high or too quickly. It is best to add sour cream to a dish just before serving.
It gives baked goods a texture that's airy and moist, and even adds an extra bit of creaminess to cheesecake. You can substitute an equal amount of sour cream for cream cheese in recipes.
before you add. – Choose 'cooking cream' or 'Creme fraiche' or double cream which are less likely to split. – Adding cream to a water based recipe can cause this splitting due to the combination of cream (oil) and stock (water). Stirring regularly helps to avoid this.
The one thing to remember when making pan sauces with sour cream is that the cream will split if it is heated too much so when making the sauce take the pan off the heat before stirring in the sour cream, then warm it gently over a very low heat if needed.
Dairy has three main components: fat, proteins, and water. Curdling occurs when the proteins in a sauce denature and bind together, separating from the water and tightening up into curds.
Water or liquid is necessary to create steam. When cooking meat or poultry, the water or liquid level should cover the ingredients to ensure effective heat transfer throughout the crock. Some manufacturers of slow cookers recommend adding liquid to fill the stoneware 1/2 to 3/4 full.
You only need to add water to a crock pot, if the meal or recipe you're slow cooking requires it. Some meals, like a ham, do not require any liquid to be added. Other recipes, like slow cooker bread or soup, do require water. And finally, some recipes will require added liquid (like broth), but not water.
Sour cream is usually safe to consume, even when heated. If you choose to microwave your sour cream, it is most likely safe to consume. However, if your sour cream is warm because it has been sitting at room temperature for more than 2-3 hours under high temperature, it is best to not consume it and throw it away.
What happens to sour cream when heated?
If the sour cream is left out in temperature warmer than 90 degree Fahrenheit, the harmful pathogens multiply very quickly and the fermented cream will spoil.
Surprising, to me anyway, was my discovery that sour cream has a fat content sufficiently lower than heavy cream, such that boiling it will cause problems. So my recommendation is to add it at the end of cooking your dish, on low heat, and just keep it on the flame long enough to heat it. That way you're totally safe.

Homemade Sour Cream Substitute in Minutes - The Frugal Chef - YouTube
Meaning.. cooking dairy for hours in a crockpot with probably just curdle the dairy. If cheese, milk, cream cheese, cream or other dairy product is called for it will typical be added just before serving or in the last 15 minutes of cooking.
Sour Cream
Sour cream is an extremely popular and versatile product. It's made from coagulating cream, which means that it's an excellent substitute for cream cheese, especially for dips or other recipes.
Sour cream can curdle if added directly to hot liquid. To prevent curdling, temper the sour cream by stirring a little of the hot liquid into it and then adding the warmed sour cream mixture to the pan. Buttered egg noodles (see below for details of our tasting) are the classic accompaniment to this recipe.
Meaning.. cooking dairy for hours in a crockpot with probably just curdle the dairy. If cheese, milk, cream cheese, cream or other dairy product is called for it will typical be added just before serving or in the last 15 minutes of cooking.
And while it's perfectly safe to eat sauces that have curdled, it's not especially appetizing. Here are a few strategies to combat curdling: If a dairy-based sauce curdles, immediately halt the cooking process. Take your pan off the heat and place it in an ice bath.
Just like in a slow cooker, most dairy products such as cheese, milk and sour cream will curdle in an Instant Pot, no matter if you use the pressure cooking setting or the slow cooking setting. Add these ingredients after the dish cooks or avoid making the recipe in the Instant Pot altogether.