Honeywell T675A1102 SPDT Temperature Control 20' Capillary 160°-260°F

The Honeywell T675A1102 is a single pole double throw temperature control device used in a variety of HVAC equipment to keep temperatures within a specific range. It uses a capillary bulb sensor to monitor temperature changes in ducts, pipes, tanks, or boilers. This data is then sent to the main control unit via a 20-foot-long capillary tube. The control unit subsequently activates or deactivates the linked heating or cooling equipment based on the predetermined temperature range and differential. This enables for exact temperature control while preventing the linked equipment from overheating or freezing. Honeywell considers this exact model, the T675A1102, obsolete, and recommends the T775a2009 as a substitute.