The Lennox 33J84 features a 90-degree differential

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and speed transitions

Lennox 14B53 Temp Sensor R-22 The Lennox 33J84 features aThe Lennox 14B53 Ambient Outdoor Temperature Sensor is a precision HVAC thermistor engineered to provide real time air temperature data to the integrated control board. This genuine OEM Lennox replacement part, also identified as 14B5301, features 28 inch leads for versatile field installation and secure routing to the terminal block. As a critical component for system staging, this ambient air sensor allows the outdoor unit to accurately calculate