Reznor 174809 Pressure Switch

The Reznor 174809 Pressure Switch is a critical OEM safety component designed for precise airflow monitoring in gas-fired heating units. This 1.10"wc SPDT compression pressure switch (Single Pole Double Throw) ensures the inducer motor is moving sufficient combustion air before allow the ignition sequence to proceed. Engineered to replace the Reznor RZ174809 and compatible with the GFS3602-2997 specification, this switch is a direct-fit solution for maintaining the operational integrity of your HVAC equipment.

For service technicians, this Hvac pressure switch replacement is essential when diagnosing furnace lockouts or inducer motor pressure switch failures. It features high-quality internal diaphragms and electrical contacts that respond to precise pressure differentials, preventing unsafe operation. Whether you are servicing a Reznor unit heater or a larger industrial system, using an OEM Reznor pressure switch ensures the system stays within the original manufacturer's design parameters for safety and venting performance. The robust construction is built for the demanding duty cycles of commercial and residential heating environments.

• Matches exact OEM specifications for Reznor 174809 to ensure system compatibility and safety.
• Features a 1.10" water column setpoint for accurate draft detection.
• Equipped with SPDT electrical contacts for versatile wiring and control circuit integration.
• Durable compression-style housing resists vibration and thermal stress in high-use HVAC applications.
• Helps resolve common furnace pressure switch stuck open error codes and ignition failures.

• How do I know if my Reznor pressure switch is failing? If the inducer motor starts but the burner fails to ignite, or if the control board displays an airflow error code, the switch may be failing to close or detect the required 1.10"wc pressure.
• Is the Reznor 174809 a direct replacement for my unit? This switch is designed specifically for Reznor models requiring a 1.10"wc SPDT configuration. Always verify your unit's data plate or existing part number before installation.
• Can I use a universal pressure switch instead of the 174809? To maintain safety certifications and precise setpoints, using the dedicated OEM Reznor 174809 is highly recommended over adjustable universal switches.

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.