Reznor rz197205 Pressure Switch Udap Udx UDZ175

Product Description

The REZNOR rz197205 is a pressure switch designed for use in Reznor unit heaters. Pressure switches monitor combustion air or inducer pressure to confirm safe operating conditions before allowing the burner to fire. This switch is a direct replacement component used by HVAC technicians servicing Reznor heating equipment. It functions as a safety device within the control circuit, preventing ignition if adequate draft or airflow is not established. Proper operation of this switch is critical to safe and code-compliant heater function.

This pressure switch is compatible with Reznor UDAP 30-45 and UDAP 125 unit heaters, the UDX045, and UDX/UDZ175 models. It is intended for commercial and light-industrial heating applications where Reznor gas-fired unit heaters are installed. Replacement is typically required when a heater fails to ignite or faults on a pressure-related lockout code. Licensed commercial HVAC technicians perform this service as part of routine diagnostics or scheduled maintenance.

Key Features

• OEM-style replacement pressure switch for Reznor unit heaters
• Monitors draft or combustion air pressure to enable safe burner ignition
• Compatible with multiple UDAP, UDX, and UDZ model heaters
• Functions as a safety interlock within the heater control circuit
• Direct replacement for Reznor part 197030 where applicable

Compatibility

Compatible with Reznor UDAP 30-45, UDAP 125, UDX045, UDX175, and UDZ175 unit heaters. Also referenced as a replacement for Reznor pressure switch 197030.

Installation Notes

Installation should be performed by a licensed commercial HVAC technician. Shut off power to the unit heater and close the manual gas shutoff valve before beginning any service work. Verify correct pressure switch setpoint and tubing connections before restoring power. Follow the manufacturer wiring diagram and applicable local mechanical codes when reinstalling or replacing control-circuit components.

Technical Specifications

• Component Type: Pressure Switch
• Application: Combustion Air / Draft Safety Switch

Standard Information

• Brand: REZNOR
• Manufacturer Part Number: rz197205