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Technicians should verify 24VAC output continuity before confirming a board failure
This self-powered unit eliminates the need for an external power supply
Does this unit include a floor sensor in the box
obstructed flue
Lennox 99M99 Pressure Switch 322838-754 Technicians should verify 24VAC outputAs 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),
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