Common Questions What are the signs of a failing solenoid valve

Normally Open Configuration: Ensures fail-safe operation by defaulting to the open position during pneumatic signal loss

0 Cv rating provides the necessary flow for fan coils

Is the 0130M00139S compatible with 208/240V systems

serving as a critical safety or process feature

Lennox 10X87 Controller Refrigerant Common Questions What are theThe 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