Always verify the part number against your specific cabinet

It serves as a direct replacement for DF55A and A5F-D models

Safe Start Technology: Performs a hardware and software self-check on every call for heat to ensure system integrity

This 5-gallon bubbler pump cover facilitates optimal circulation and protects the impeller assembly from debris intrusion

Venstar VST1100FS Thermostat Els PW 29614 Always verify the part numberThe Venstar VST1100FS is a professional grade, 7 day programmable thermostat engineered specifically for multi stage HVAC systems. As a direct replacement for HH07AT215, this unit offers a seamless retrofit for contractors maintaining older Carrier or standard 24V installations. This 2H 2C heat pump thermostat supports up to 2 stage heating and 2 stage cooling, featuring an intuitive auto changeover function to manage temperature fluctuations without