Robertshaw 2374-498 Air Switch

For veteran technicians and contractors requiring a reliable pressure sensing solution, the Robertshaw 2374-498 Air Switch is a high-performance, field-adjustable air pressure switch designed for residential and light commercial HVAC applications. This SPDT air switch features an adjustable set point range of 1.0" to 4.0" WC, making it a versatile 1:1 replacement for critical components in furnaces, electronic air cleaners, and humidifiers. Engineered for precision, the 2374-498 is practically insensitive to temperature fluctuations, maintaining accurate calibration across an operating range of -40°F to 190°F. This unit serves as the direct replacement for 34333102 and 1093433, ensuring seamless compatibility during emergency repairs. The contractor kit includes the necessary mounting hardware and adjustment tool, allowing for efficient vertical mounting and quick calibration. With its universal air sensing capabilities, this switch can be actuated by positive, negative, or differential pressure, providing the robust airflow detection required for modern combustion and ventilation systems.

Key Benefits:

• Broad Compatibility: Functions as a high-accuracy direct replacement for 1093433 and 34333102, reducing van stock requirements.
• Field Adjustability: The 1.0" to 4.0" WC range allows for precise tuning to specific system requirements using the included calibration tool.
• Versatile Connectivity: Air sample line connectors are designed to accept 1/8", 1/4", or 3/8" tubing for maximum flexibility on the job site.
• Reliable Performance: Features a rugged diaphragm set for vertical mounting and high-quality 1/4" spade electrical connections for secure wiring.

Common Questions:

What is the best Robertshaw 2374-498 replacement for a furnace pressure switch?
The 2374-498 is specifically designed as a universal adjustable solution for systems requiring a set point between 1.0" and 4.0" WC. It is the industry-standard replacement for Lennox, Heil, and York part numbers, including 34333102 and 1093433.

How do I adjust the Robertshaw 2374-498 pressure setting?
Adjustment is performed using the included tool to rotate the set point screw. To ensure peak performance and safety, the setting should be verified with a calibrated manometer during the HVAC air switch installation.

Can this switch handle both positive and negative pressure?
Yes, this SPDT air switch is designed to sense positive, negative, or differential pressure, providing technical flexibility for various draft and airflow sensing applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.