Source1 2435979000 Air Pressure Switch -0.15 Iwc on Fall Spno

Product Description

The Source1 2435979000 is an air pressure switch designed for HVAC systems where reliable pressure sensing and circuit control are essential. This switch is configured as Single Pole Normally Open, commonly referred to as SPNO. It activates on a pressure fall, with a set point of -0.15 inches water column. When air pressure drops to or below that threshold, the switch closes the circuit and triggers the appropriate system response. This behavior makes it well suited for proving airflow, detecting blocked filters, and monitoring draft conditions in furnaces, air handlers, and ventilation systems.

Air pressure switches like the Source1 2435979000 are critical safety and control components in heating and cooling equipment. In a forced-air furnace, for example, the pressure switch verifies that the inducer motor is creating sufficient negative pressure before allowing the ignition sequence to proceed. If the switch fails or the pressure set point is not reached, the control board will lock out the heating cycle to prevent unsafe operation. Using the correct replacement switch with the right set point and contact configuration is essential to restoring proper system function.

HVAC technicians rely on pressure switches rated to precise set points to maintain system integrity. The -0.15 inches water column on-fall rating tells the technician exactly when this switch will activate, making it straightforward to match to the original equipment manufacturer specification. The SPNO contact design means the circuit is open under normal static conditions and closes only when the pressure differential is detected, providing a fail-safe operating mode. Source1 components are manufactured to meet or exceed OEM standards, making this switch a dependable choice for residential and light commercial HVAC service and repair work.

• SPNO contact configuration closes the circuit on a pressure fall at -0.15 inches water column
• Used for airflow proving, draft sensing, and safety lockout applications in furnaces and air handlers
• Designed to meet or exceed OEM specifications for reliable replacement performance

Product Highlights

The Source1 2435979000 air pressure switch offers a precise -0.15 inches water column set point with an SPNO contact design, making it a direct-fit solution for HVAC airflow proving and safety control applications.

Product Information

Standard Information

• Brand: SOURCE1
• Manufacturer Part Number: 2435979000

Technical Specifications

• Switch Type: Air Pressure Switch
• Contact Configuration: Single Pole Normally Open (SPNO)
• Activation Mode: On Fall
• Set Point: -0.15 inches water column (IWC)