Reznor 203933 Pressure Switch WC - 0.75 Red

The Reznor 203933 is a pressure switch designed for use in Reznor heating equipment. This safety component monitors air pressure differentials to ensure proper combustion air flow and safe operation of gas-fired heating systems.

Key Specifications:

• Pressure setting: 0.75" W.C. (water column)
• Manufacturer part number: 203933
• Interchangeable with IS20232-5272
• Red color coding for easy identification
• Direct OEM replacement part

This pressure switch is a critical safety device that detects insufficient airflow or blocked venting conditions. When pressure falls outside the specified range, the switch opens to prevent furnace operation, protecting against unsafe operating conditions. Designed specifically for Reznor unit heaters and heating systems, this genuine OEM component ensures reliable performance and proper system function.