Armstrong Furnace R100684-04 Pressure Switch allowing for easy recalibration in

allowing for easy recalibration in the field

it has failed and must be replaced

rust streaks near the inducer

Always match the OEM rating for the specific furnace model

Electrical Reliability: High-quality SPNO switch contacts provide clean 24V signal transmission to the integrated furnace control board

Armstrong Furnace R100684-04 Pressure Switch allowing for easy recalibration inThe 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