Lennox 38M77 Pressure Switch 318973-401 Standard replacement motors typically require

Standard replacement motors typically require a new run capacitor (check the nameplate for MFD rating) to ensure proper starting torque and motor longevity

Rectorseal 45004 Acid-Away is a professional-grade acid neutralizer specifically formulated to chemically eliminate these corrosive contaminants

the universal style mounting bracket simplifies retrofitting by aligning with existing mounting holes

though common mechanical failure of the internal diaphragm also necessitates a replacement switch

it is frequently used in A

Lennox 38M77 Pressure Switch 318973-401 Standard replacement motors typically requireThe Lennox 38M77 High Pressure Switch is a critical OEM safety component designed for R 410A HVAC systems. Engineered to monitor discharge line pressure, this switch prevents compressor damage by interrupting the control circuit when pressures exceed safe operating limits. With a factory calibrated trip setting of 640 psi and a reset threshold of 475 psi, it ensures precise high limit protection in commercial and industrial rooftop units and split