The fixed differential is designed to minimize short-cycling while maintaining tight temperature tolerances within the 100°F to 200°F operating window

and Payne condenser units

Common Questions What are the signs of a failing solenoid valve

Featuring a 1/2" NPT inlet and 3/4" NPT outlet

Is the 0130M00139S compatible with 208/240V systems

Lennox 10X87 Controller Refrigerant The fixed differential is designedThe Lennox 10X87 C3 Controller is a high performance HVAC control board engineered for precision management of heating and cooling cycles in light commercial and residential Lennox Prodigy systems. This OEM replacement part, originally identified as Lennox 103976 01, provides the essential logic required to regulate temperature, airflow, and humidity levels across up to three independent zones. As a core component of the Lennox C3 control system, this