please verify the serial number (the 3rd and 4th digits indicate the year) to confirm if this kit or a legacy alternative is required

OEM Compatibility: Designed as a drop-in replacement for Lennox HVAC equipment

the A23519 manages water intake with high seat integrity

while the 5-foot capillary tube provides the reach needed for flexible bulb placement on suction lines

Featuring a robust SPST (Single Pole Single Throw) configuration

York S1-025-37399-480 Belt 318518-761 please verify the serial numberThe York S1 025 37399 480 Crankcase Heater is a critical preventative maintenance component designed for HVAC compressor protection in commercial and industrial cooling systems. This belt type crankcase heater operates at 480 Volts and delivers 70 Watts of constant heat to keep oil temperature above the refrigerant's saturation point, effectively preventing refrigerant migration during off cycles. Engineered with 48 inch leads and a flexible design,