Field Flexibility: Includes a minimum position set screw to allow for constant air bleed and can be field-converted to power open/spring close in minutes

verifying York S1-373-19831-002 specifications against the original equipment blower wheel clearance is essential for maintaining strict airflow tolerances and operational efficiency

There is no functional or technical difference between these two part numbers

Advanced Reliability: Features stainless steel bellows and a weather-resistant IP20 enclosure for long-term performance in demanding mechanical rooms

The Allanson 2721-647 Ignition Transformer is a compact

Williams P321900 Ignition Control 318820-201 Field Flexibility: Includes a minimumThe Williams P321900 Ignition Control is a dedicated OEM replacement part engineered for precise sequence management in gas fired heating equipment. As the direct successor to the P32190, this electronic ignition module provides the necessary logic for safe pilot or main burner light off. This control is frequently utilized in Williams Monterey furnaces and Forsaire wall heaters, where maintaining specific timing for trial for ignition and flame