Reznor WC SPDT Pressure Switch

The Reznor WC SPDT pressure switch (also called a combustion air pressure switch, draft switch or airflow switch) is an OEM safety control for Reznor gas-fired unit heaters. It senses pressure differences and opens or closes electrical contacts depending on the pressure it detects.

Key Features:

• SPDT (single pole, double throw) contacts let the switch be wired into control boards and safety circuits that use normally open or normally closed states.
• Calibrated to a set point in inches of water column (WC). Each model in the line has its own factory-set pressure threshold.
• Combustion safety function: it verifies that the inducer or venting draft is established before the ignition sequence continues. This helps prevent operation with restricted flue or airflow.
• Genuine Reznor OEM replacement part made for commercial and industrial heating equipment.
• Built to hold up to the repeated on/off cycling typical of heating applications.

A Reznor SPDT pressure switch helps keep the heater operating safely and reliably, and it can reduce nuisance lockouts caused by an incorrect or failing switch. Choose the variant whose set point matches your heater's original specification.