A second damper control module must be wired in parallel on the ABCD bus with specific DIP switch settings adjusted to activate the additional zone addresses

Flares: Ensures a tight

This control is typically utilized as a low-pressure safety cutout to protect compressors during loss of charge or as a head pressure control for fan cycling in low ambient conditions

What causes a "pressure switch stuck open" error with this part

York S1-024-35903-000 Pressure Switch 320074-702 A second damper control moduleThe York S1 024 35903 000 is a high precision dual stage pressure switch engineered for modern high efficiency gas furnaces. This component is critical for monitoring the static pressure generated by the draft inducer blower, ensuring the combustion process only initiates under safe venting conditions. With factory calibrated set points of . 45" WC and . 85" WC, this switch provides granular feedback to the integrated furnace control board regarding