Lennox 88K38 Air Sensor 320735 701 this Barber Colman crossover component this Barber Colman crossover component utilizes a snap acting SPDT switch mechanism to divert air signals between ports based on branch line pressure Always cross reference your boiler serial number or previous part number (such as RLY30062) before installation a standard 10K ohm reading at 77°F (25°C) indicates the sensor is within operational range It must be field mounted in the supply air plenum
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Lennox 88K38 Air Sensor 320735-701 this Barber Colman crossover component