You should check the manufacturer's instructions.
Answered by Dave, Electrical Safety Expert
Check the manufacturer's instructions. If you want to leave the house while the slow cooker is running, set it on low. Save the high heat option for when you are in the house.
Always set the slow cooker on a heat-proof surface.
Pull the slow cooker at least six inches away from the wall, and keep the power cord away from the edges of your appliance.
Don’t fill it too high or too low – check the manufacturer’s instructions but typically it should be one half to three-quarters full.
Always turn off the slow cooker at the socket when not in use.
In general use, if you notice a burning smell or any unusual noises, switch the slow cooker off immediately and contact the retailer and/or manufacturer.