Weil McLain 571-624-407 Pressure Switch 3.25″wc

Description

Weil McLain 571-624-407 Pressure Switch — 3.25″ W.C.

The Weil McLain 571-624-407 is an OEM pressure switch designed for use with Weil McLain boilers. Calibrated to a setpoint of 3.25″ water column (W.C.), this switch monitors flue gas pressure to verify proper draft inducer operation before allowing burner ignition — a critical safety function in modern condensing and non-condensing boiler systems.

Key Features

• OEM Weil McLain replacement pressure switch
• Setpoint: 3.25″ W.C. (water column)
• Monitors inducer/draft pressure to ensure safe combustion conditions
• Prevents burner ignition if adequate draft is not established
• Direct OEM replacement for compatible Weil McLain boiler models
• Ensures reliable, code-compliant boiler operation

Application

This pressure switch is a genuine Weil McLain replacement part, engineered to integrate seamlessly with compatible Weil McLain boiler systems. It plays a vital role in the boiler’s safety circuit by confirming that the draft inducer is operating at the correct pressure differential before the control board allows the gas valve to open. Replacing a faulty or failed pressure switch with the correct OEM part helps maintain system reliability, efficiency, and safety compliance.

Specifications

• Brand: Weil McLain
• Part Number: 571-624-407
• Switch Type: Pressure Switch
• Setpoint: 3.25″ W.C.