Lennox 99M99 Pressure Switch 322838-754 Built with dedicated 24V inputs

Built with dedicated 24V inputs and sophisticated diagnostic LED outputs

This self-powered unit eliminates the need for an external power supply

this plug provides the exact pin configuration required for a true plug-and-play installation without the need for field modifications or wire crimping

it prevents dust and debris infiltration

Lennox 99M99 Pressure Switch 322838-754 Built with dedicated 24V inputsAs a service ready high pressure switch for diagnostic and repair calls, the Lennox 99M99 is a critical safety component designed for high side refrigerant monitoring. This genuine Lennox replacement part is engineered to actuate at 590 PSI and features an automatic reset at 418 PSI, ensuring the compressor is protected against catastrophic over pressure conditions common in R 410A systems. Built with 106 inch leads and rated for 120 240 VAC (375 VA),