Not all heat pumps have emergency heat. However, most modern heat pump systems are designed with some form of backup or emergency heat source, especially in colder climates where temperatures can drop significantly. Here's a detailed look at what emergency heat is, why it's used, and the different types of backup heating methods that might be found in a heat pump system.https://rhcchvac.com/do-all-heat-pumps-have-emergency-heat/