Armstrong Furnace R100684-04 Pressure Switch Always match the OEM rating

Always match the OEM rating for the specific furnace model

rust streaks near the inducer

A trip is typically caused by restricted airflow

Standardized Wiring: Pre-stripped 8-inch leads use industry-standard color coding (White/Black primary

it has failed and must be replaced

Armstrong Furnace R100684-04 Pressure Switch Always match the OEM ratingThe Armstrong Furnace R100684 04 Pressure Switch is a critical safety component engineered for precise inducer motor verification and flue gas management. This OEM replacement part is factory calibrated to a . 65"wc set point, ensuring the combustion blower is generating the necessary static pressure before allowing the ignition sequence to proceed. As a SPST (Single Pole Single Throw) switch, it provides a reliable normally open circuit that closes