How long do you heat a pre-cooked boneless ham in a crockpot on low?

To heat a pre-cooked boneless ham in a crockpot on low, you should typically allow it to cook for about 4 to 6 hours. Make sure to add a bit of liquid, such as broth or a glaze, to keep it moist. Always check that the internal temperature reaches 140°F for safe consumption. Adjust the time as needed based on the size of the ham.