Resistored Design: Integrated resistor extends tank life by mitigating electrolytic corrosion

Field testing typically requires checking for 6-10V DC at the harness to confirm the board is sending power before verifying the fluctuating signal as the motor rotates

making it an ideal choice for placement in the air stream where rapid thermal response is required

ensuring safe and reliable furnace operation

The inclusion of a robust spring clip allows for rapid

Armstrong Furnace R100684-04 Pressure Switch Resistored Design: Integrated resistor extendsThe 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