Reznor 193811 Pressure Switch

The Reznor 193811 Pressure Switch is a critical safety component engineered for precision monitoring of combustion air and venting pressures in commercial and industrial heating systems. As a genuine Reznor OEM pressure switch, it features a Single Pole Double Throw (SPDT) configuration, allowing for versatile control of both normally open and normally closed circuits depending on the system's differential requirements. This specific model is equipped with a 1/4" barb connection for secure pneumatic integration and is designed to interface seamlessly with Reznor gas-fired unit heaters and infrared systems. By maintaining specific set points, this differential pressure switch prevents the burner from firing under hazardous conditions, such as blocked flues or inducer motor failure, ensuring optimal appliance performance and long-term reliability. Its rugged construction facilitates stable operation in high-demand HVACR environments, making it the standard choice for professional contractors performing maintenance or repairs.

• Precise Pressure Regulation: High-accuracy SPDT switching prevents improper combustion and hazardous system operation.
• Universal 1/4" Barb Connection: Ensures compatibility with standard silicone or rubber pressure tubing for rapid field replacement.
• OEM Compatibility: Specifically designed as an authentic Reznor 193811 replacement part for guaranteed fit and function.
• Enhanced System Safety: Actively monitors for pressure drops or venting obstructions to protect heat exchangers and burner assemblies.

• How do I know if the pressure switch is causing my heater to lock out? If your inducer motor is running but the ignition sequence does not begin, use a multimeter to check for continuity across the SPDT terminals once the set point pressure is reached.
• Can I use this for high-elevation applications? The Reznor 193811 is calibrated for standard elevations; however, specific high-altitude kits (like the 196653) may be required depending on your local atmospheric pressure and unit model.
• What does SPDT mean for my wiring? It stands for Single Pole Double Throw, meaning the switch can either complete or break a circuit when the diaphragm moves, allowing it to signal the control board of both "make" and "break" conditions.

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.