York 025-37853-000 Crankcase Heater 30067439-890 This two-position zone valve is

This two-position zone valve is specifically designed to handle the thermal rigors of low-pressure steam

ensuring the outdoor coil is completely clear of ice before returning to heating mode

non-tripped switch should show continuity (close to 0 Ohms)

The unit features a hinged design that allows the cover to swing open fully for easy technician access to setpoints and calibration without removing the entire assembly from the wall

it is the standard ground plate for roughing in surface-mounted thermostats in the T-4000 product line when working with masonry or plaster

York 025-37853-000 Crankcase Heater 30067439-890 This two-position zone valve isThe York 025 37853 000 Crankcase Heater is a critical 120V, 150W auxiliary component designed to protect high performance refrigeration and air conditioning compressors. This OEM York replacement part prevents refrigerant migration into the compressor oil during the off cycle, maintained at 150 watts to ensure proper oil viscosity and prevent flooded starts in low ambient conditions. Built with a rugged steel housing and a 4 inch by 6 inch heating