Williams P500409 Wire 321894-709 Always verify the part number

Always verify the part number in the specific heater’s service manual

Programmed Performance: Pre-flashed with York’s proprietary airflow parameters for exact CFM delivery across various ductwork configurations

If the area is clear of vapors but the 7-flash code persists

Can I use the 79J75 to replace a fixed orifice piston

primarily handling water

Williams P500409 Wire 321894-709 Always verify the part numberProfessional grade furnace maintenance requires exact electrical specifications, and the Williams P500409 Wire Assembly delivers the necessary conductivity for high demand heating systems. This OEM wire harness is engineered specifically for the Williams Vented Hearth Heater series, ensuring a precise match for internal circuitry. Designed to facilitate consistent power distribution and signal integrity, the P500409 is a critical component for