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The 042N4233 is the current production model designed to replace the discontinued 042N4222
Common Technical Questions What causes this limit switch to trip repeatedly
or auxiliary heat kits
Common Questions How do I identify a faulty 150F limit switch
leak-proof interface between the cover plate and the heat exchanger or boiler section
Lennox 26G10 Defrost Sensor The 042N4233 is the currentThe Lennox 26G10 Defrost Sensor is a critical thermistor based control designed for precision management of the defrost cycle in residential Lennox heat pump units. Engineered to monitor the outdoor evaporator coil temperature, this sensor triggers the defrost sequence to prevent excessive ice buildup that can choke airflow and degrade system efficiency. This specific model features an L70 35F temperature rating, meaning it is calibrated to open at
US$ 10.26
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