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verify static pressure and temperature rise against the data plate before assuming the switch is faulty
What does the red color coding signify
Engineered for HVACR professional use
Durable Construction: Nickel-plated brass finish resists corrosion and maintains professional appearance
OEM Construction: High-grade disc housing and male spade connectors ensure a secure
Lennox 15M20 Pressure Switch Els PW 17895 verify static pressure and temperatureThe Lennox 15M20 Pressure Switch is a critical safety component designed for precise draft proving in residential and commercial furnaces and rooftop units. This OEM Lennox 15M20 switch is a single pole, single throw (SPST) normally open configuration that closes when it detects a pressure fall of . 10"wc. Built with a 1 4" barb connection for easy hose attachment, this air proving switch ensures the combustion air inducer is pulling sufficient vacuum