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and mixed gas-air systems
24VDC operation provides different opening characteristics than AC
High-Grade Construction: Specifically designed to withstand thermal cycling and acidic condensate for long-term reliability in gas furnace maintenance
ensuring functional insulation and industrial-grade performance
Lennox 18J74 Pressure Switch Els PW 17895 and mixed gas-air systemsThe Lennox 18J74 Pressure Switch is a high precision low ambient pressure switch engineered to regulate head pressure by cycling the outdoor fan motor during cooling cycles. Designed specifically for HVAC professionals, this OEM replacement part ensures your system maintains consistent evaporating temperatures, effectively preventing evaporator coil icing and protecting the compressor from liquid slugging. With an open temperature of 150F and a close
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