Lennox 58H31 Pressure Switch Refrigerant System Longevity: Prevents compressor damage

System Longevity: Prevents compressor damage by ensuring 100% vapor state before entering the suction line

The 2878400S Wire Harness provides the necessary leads for standard thermostat wiring and auxiliary accessory integration

this 1/4 SAE filter drier provides the necessary filtration to prevent internal corrosion and maintain low pressure drop across the liquid line

This item is the cover plate gasket only

Lennox 58H31 Pressure Switch Refrigerant System Longevity: Prevents compressor damageThe Lennox 58H31 Pressure Switch is a critical safety component designed for precise draft verification in residential and light commercial HVAC systems. This genuine OEM part features a factory calibrated 3. 00" WC (Water Column) set point and a Single Pole Single Throw (SPST) configuration, ensuring the inducer motor establishes proper static pressure before allowing the ignition sequence to proceed. As the verified direct replacement for the legacy