Reznor 211130 Pressure Switch

The Reznor 211130 Pressure Switch is a critical safety and operational component designed for Reznor HVAC equipment, specifically unit heaters and gas-fired duct furnaces. This OEM replacement part is factory-calibrated to a 1.70" wc setpoint, ensuring the inducer motor or venter assembly provides sufficient airflow before allowing the ignition sequence to proceed. As a single-pole double-throw (SPDT) switch, it offers versatile electrical configuration—Common, Normally Open, and Normally Closed terminals—to match specific control board logic and safety loops. Built for the rigors of commercial and industrial heating environments, this 1.70"wc compression switch features a heavy-duty diaphragm and rugged housing to prevent nuisance tripping and ensure long-term reliability. HVAC technicians often require this specific differential air pressure switch when troubleshooting unit heater cycles that fail at the inducer prove stage. Utilizing a genuine Reznor 211130 ensures drop-in compatibility and maintains the original safety certifications of the heating appliance.

• Precise 1.70" WC Calibration: Pre-set for factory accuracy, eliminating the need for field adjustments and ensuring safe burner operation.
• SPDT Electrical Configuration: Provides flexible wiring options (NO/NC/C) to integrate seamlessly with various Nortek Global HVAC control systems.
• OEM Direct-Fit Design: Simplifies installation for contractors by matching existing 1/8" NPT or compression mounting footprints.
• Enhanced System Safety: Actively monitors for blocked flues or motor failures, preventing gas valves from opening under unsafe venting conditions.

What are the symptoms of a failing Reznor 211130 pressure switch?
Common indicators include the inducer motor running continuously without ignition, or the diagnostic LED on the control board flashing a "Pressure Switch Stuck Open" or "Closed" error code. Technicians should verify the actual water column pressure with a manometer before replacing the switch.

Can I use an adjustable universal switch instead of the 211130?
While universal switches exist, installing a genuine 211130 OEM part is the professional standard. It ensures the specific 1.70" wc trip point required by the manufacturer is maintained, which is critical for the safe operation of the combustion cycle.

Does this switch handle high-voltage circuits?
The Reznor 211130 is typically rated for 125VAC or 250VAC at 15A/10A respectively. However, in most Reznor unit heaters, it operates within a 24V safety circuit. Always verify the electrical ratings on the component label against your specific equipment schematic.

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.