Lennox 10X87 Controller R 134A Utilizing genuine York service parts Utilizing genuine York service parts for terminal repairs preserves original equipment specifications and prevents the impedance issues often associated with generic aftermarket pigtails or spliced connections the VM2221 handles media temperatures from 32° to 200°F and is compatible with up to 60% glycol solutions The 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 the C3 logic is capable of managing humidity levels when paired with the appropriate Lennox sensors and specialized configuration