Reznor 196654 Pressure Switch

The Reznor 196654 Pressure Switch is a critical safety component designed for precise combustion air proving in Reznor HVAC unit heaters. This SPST (Single Pole Single Throw) pressure switch is factory-calibrated to a .42" WC (Water Column) set point, ensuring the inducer motor generates sufficient static pressure before allowing the ignition sequence to proceed. Engineered with dual 1/4" barb connections, this switch facilitates secure differential pressure sensing across the heat exchanger, protecting the system against vent blockages or inducer failure. As a direct replacement for Reznor 120322, the 196654 is frequently utilized in high-altitude pressure switch kits for tubular infrared heaters (Model TR) and older FE/BE series heaters operating at elevations between 4,000 and 8,000 feet. Maintaining the integrity of the diaphragm switch is essential for preventing short cycling and ensuring reliable safety circuit operation in demanding commercial and industrial environments.

• Direct OEM Compatibility: Serves as the authoritative replacement for Reznor 120322, ensuring exact physical and electrical fitment.
• High-Altitude Ready: Specifically rated for high-elevation applications (up to 8,000 ft) where lower atmospheric pressure requires precise .42" WC sensitivity.
• Reliable Sensing: The dual 1/4" barb design supports both positive and negative pressure lines for accurate airflow monitoring.
• Robust Safety Logic: Standard SPST configuration integrates seamlessly into existing Reznor limit control circuits to prevent hazardous operation.
• Industrial Build Quality: Constructed to withstand the thermal cycling and vibration typical of gas-fired unit heaters.

What are the signs of a failing Reznor pressure switch?
Technicians typically observe the inducer motor running indefinitely without the gas valve opening, or the control board flashing a pressure switch stuck open error code. Check for cracked silicone tubing or moisture in the lines before assuming the switch is defective.

Can I use this switch for standard altitude units?
The 196654 is calibrated for .42" WC, which is common for high-altitude kits or specific low-static applications. Always verify the WC rating on the existing switch's label; using a switch with the wrong set point can lead to nuisance tripping or unsafe combustion levels.

Is the silicone tubing included?
While often sold as part of a high-altitude kit (which includes 5-1/4" silicone tubing), always inspect your existing connections for 1/4" compatibility during installation to ensure a vacuum-tight seal.

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.