Lennox 97J69 Pressure Switch Freon this genuine Carrier part prevents

this genuine Carrier part prevents premature abrasion of internal screw compressor or reciprocating components

A trip usually indicates that the net oil pressure (pump outlet minus suction pressure) has not reached the setpoint within the 60-second window

P400AD-2 is the direct replacement for P300AD-2

Common signs include the unit humming but not starting

Lennox 97J69 Pressure Switch Freon this genuine Carrier part preventsThe Lennox 97J69 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor induction blower performance and flue venting integrated within the combustion circuit. This SPST (Single Pole Single Throw) vacuum switch is factory calibrated to a . 85" WC (Water Column) set point, ensuring the system only initiates the ignition sequence when proper static pressure is established. Featuring a standard 1 4" barb