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the McDonnell & Miller 340000 (Model SA25A-15) is a precision-machined Stem
The Lennox 48G63 Supply Air Sensor is a critical diagnostic component engineered for high-precision temperature monitoring within residential and commercial air handlers and heat pump systems
making it ideal for large commercial condenser units
preventing furnace short cycling or total system lockout caused by heat exchanger overheating
This 15-cell assembly is critical for capturing latent heat from combustion gases
Lennox 26W86 Pressure Switch 340155-7024 the McDonnell & Miller 340000The Lennox 26W86 is a mission critical 2 stage high altitude pressure switch engineered for precision in demanding environments. Designed as a direct Lennox 101021 10 OEM replacement, this dual stage component is calibrated for systems operating above 4,500 feet where air density impacts combustion. It features dual set points of 0. 90" WC for low stage and 1. 20" WC for high stage operation, ensuring the inducer motor maintains proper static pressure