Carrier, like most heat pump manufacturers, sells replacement thermostats for its products. While its heat pumps can work with many third-party thermostats, using one designed for heat pumps can result in significant savings.
Heat pumps sometimes struggle in especially cold environments since there's so little heat to draw from the air outside. To ensure safety, heat pumps are equipped with an emergency heating mode that uses effective but inefficient electrical resistance heating. As a result, thermostats designed for use with heat pumps allows users to turn emergency heating on or off. Using a thermostat designed for other types of heating systems may set the heat pump into emergency heating mode, leading to higher heating costs.