York S1-025-19961-701 Belt 328140-751 System Safety: Enables immediate visual

System Safety: Enables immediate visual verification of boiler water levels to protect the heat exchanger from dry fire conditions

the 21D64-2 is designed specifically to convert both flat and spiral 120V silicon carbide igniters to the more durable nitride technology

it is essential to strip back the heat shrink sheathing approximately one inch from the tip to ensure proper electrical contact with the liquid

Precise Alignment: Designed for left-hand orientation to ensure the spark discharge hits the optimal point on the pilot hood

York S1-025-19961-701 Belt 328140-751 System Safety: Enables immediate visualFor field techs managing large scale commercial refrigeration or rooftop units, the York S1 025 19961 701 is a critical OEM replacement part designed to maintain lubricant integrity during off cycles. This belt type crankcase heater, often referred to as a belly band heater, provides a steady 45 watts of heat at 240 volts to prevent refrigerant migration into the compressor oil. Migrated refrigerant can lead to oil dilution and catastrophic bearing