Honeywell T678A1437 Controller 30067439-890 Its robust NEMA 1 enclosure

Its robust NEMA 1 enclosure protects the snap-acting switch mechanism

the 0121491 is the lead-free updated version of the legacy 0275114 and 174A-1-60 models

The York S1-7681-3301 is a professional-grade HVAC rocker switch engineered to restore precise circuit control in a wide range of York heating and cooling systems

the York S1-025-32798-024 TXV is the specific OEM replacement required to restore precise refrigerant metering

Designed with NBR (Buna-N) seals

Honeywell T678A1437 Controller 30067439-890 Its robust NEMA 1 enclosureThe Honeywell T678A1437 is a heavy duty remote bulb controller designed for precise two stage temperature control in commercial HVACR applications. As a veteran grade mechanical thermostat, it excels in regulating temperatures within ducts, pipes, tanks, and boilers. This model features dual SPDT switch outputs that operate in sequence, making it the standard choice for staging dampers, valves, or multi stage heating and cooling equipment. With a 0