Honeywell T678A1445 2-SPDT Temperature Controller 55°F-175°F W/5' Capillary

The Honeywell T678A1445 Temperature control is used in different HVAC systems. This parts uses a 5-foot capillary tube containing a temperature-sensitive fluid. When the temperature rises or drops, the fluid either expands or contracts, which in turn turns on two SPDT switches in the control. They can then turn on or off electrical circuits and thereby control heating or cooling equipment. It controls the temperature range between 55°F and 175°F, making it perfect for boilers, water heaters, and other industrial process machines. The T678A1445 is designed to give accurate control of temperature, which is essential for any HVAC system to run properly.