Reznor 196653 Pressure Switch

The Reznor 196653 Pressure Switch is a critical safety component designed for precise combustion air monitoring in Reznor gas-fired unit heaters. This OEM replacement kit features a fixed 0.47" WC setpoint and an SPST (Single Pole Single Throw) configuration, ensuring the inducer motor generates sufficient static pressure before allowing the ignition sequence to proceed. Engineered for high-temperature HVACR environments, the switch utilizes dual 1/4" barb connections for secure pneumatic tubing attachment, preventing nuisance trips caused by vacuum leaks. Designed as a direct field replacement for legacy part numbers 120031, 159182, and 98102, the 196653 combustion pressure switch is compatible with Reznor FE130 and V3 Series UDAP/UDAS models ranging from 30 to 400 MBH. As a veteran-grade HVAC draft inducer switch, it provides reliable differential pressure sensing to protect against blocked vents or heat exchanger failures, maintaining strictly controlled combustion cycles in commercial and industrial heating applications.

Key Benefits

• Direct OEM Compatibility: Engineered specifically for Reznor UDAP and UDAS unit heaters, ensuring seamless integration with existing control boards and mounting brackets.
• Precise Pressure Calibration: Factory-set at 0.47" WC to maintain exact safety tolerances and prevent dangerous carbon monoxide buildup.
• Durable Barb Connections: Features dual 1/4" barb ports that provide a robust mechanical seal for sensing lines, reducing maintenance callbacks.
• Versatile Replacement: Consolidates multiple older part numbers (98102, 120031, 159182) into a single, high-performance SPST pressure sensor kit.
• Industrial-Grade Reliability: Built to withstand the rapid cycling and thermal stresses common in commercial gas-fired heating systems.

Common Questions

When should the Reznor 196653 pressure switch be replaced?
Technicians should test the switch if the heater fails to ignite and stays in a pre-purge state. Common failure indicators include a stuck-open SPST contact or a ruptured internal diaphragm that prevents the switch from closing despite adequate pressure from the venter motor.

Will this pressure switch work with high-altitude Reznor kits?
The 196653 is calibrated at a 0.47" WC setpoint for standard elevations. For installations above 6,000 feet, always verify the specific high-altitude pressure requirements designated in the Reznor technical manual, as setpoints may vary based on air density.

Can I use this switch as a substitute for other WC ratings?
No. Pressure switches are safety-critical components tuned to specific inducer blower curves. Replacing a higher or lower WC switch with a 0.47" WC Reznor 196653 can cause incomplete combustion or fail to detect a blocked flue condition.

Does this kit include the mounting bracket?
Yes, the Reznor 196653 typically ships as a kit including the mounting bracket and necessary hardware to facilitate installation in tight furnace cabinets.

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.