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As a Class II transformer
F differential for reliable safety cycling
OEM Compatibility: Precision-matched for Williams Monterey Counterflow 250 and 500 series top-vent wall heaters
When performing a Raypak heater repair
Reznor 193810 Switch Els PW 17895 As a Class II transformerThe Reznor 193810 is a heavy duty air proving switch pre mounted in a protective enclosure, engineered specifically for Reznor HVAC systems. Designed for reliability in demanding commercial and industrial environments, this differential pressure switch acts as a primary safety mechanism to verify proper combustion airflow before allowing the ignition sequence to proceed. It serves as a direct OEM replacement for legacy part numbers including Reznor
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