Lennox 38M77 Pressure Switch R-407A Is this valve a tight

Is this valve a tight shut-off

As a genuine OEM #75 restrictor orifice

this kit resolves common intermittent pilot ignition failures and ensures reliable flame sensing performance in demanding hydronic applications

this adjustable air differential switch is frequently used to prove airflow in exhaust systems by sensing the pressure drop across the fan

Lennox 38M77 Pressure Switch R-407A Is this valve a tightThe 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