Reznor 221228 Switch It is specifically engineered for

It is specifically engineered for units requiring a 2-inch PVC slip-fit connection

this OEM replacement part provides dual-point thermal monitoring

It utilizes the same 1000 ohm nickel reference at 70

8 mm spade terminals

As a critical component in the combustion cycle

Reznor 221228 Switch It is specifically engineered forMaintaining unit heater performance requires precise safety interlocks. The Reznor 221228 Switch is a high tolerance single pole single throw (SPST) safety device engineered to verify proper venting and combustion airflow before allowing the ignition sequence to proceed. This Reznor 221228 2. 30" WC SPST Pressure Switch is set to trigger at 2. 30 inches of water column, making it a critical component for Reznor unit heater maintenance and ensuring