Is it possible my Thermomix® could have trouble heating food if it is overloaded with a lot of ingredients or frozen ingredients? Yes. Colder and larger quantities of food may require more time to heat. Related articles Is it possible for food to burn and stick on the bottom of a Thermomix® mixing bowl? My TM5 is showing an error code, what does this mean? What if myTM5™ or TM6™ does not heat food quickly or at all? I am an active duty service member and live at an APO address. How can you fix my Thermomix®? TM31 Sealing Ring Replacement Info