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F differential for reliable safety cycling
OEM Compatibility: Precision-matched for Williams Monterey Counterflow 250 and 500 series top-vent wall heaters
the AG23B020 is the manufacturer-designated direct replacement for JG23B020
For contractors performing system maintenance or HVAC part replacement
Reznor 193810 Switch Els PW 17895 F differential for reliable safetyThe 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
