Armstrong Furnace R100306-02 Pressure Switch L99H008 If the call for heat

If the call for heat remains after 60 minutes

Always check your boiler’s wiring diagram to ensure the 24V signal matches the valve's solenoid requirements

Does this kit include the valve stem

To utilize a 4-20 mA control signal

Armstrong Furnace R100306-02 Pressure Switch L99H008 If the call for heatThe Armstrong Furnace R100306 02 Pressure Switch is a vital safety component designed for precise pressure monitoring in high efficiency HVAC systems. Engineered for reliability, this 0. 3" WC pressure switch ensures that the inducer motor is creating sufficient draft before allowing the ignition sequence to proceed. As a genuine Armstrong replacement part, the R100306 02 provides a perfect fit for compatible gas furnaces, preventing dangerous exhaust