What causes a 1014863R contactor to hum or chatter

Does this 120V assembly include the capacitor and housing

Smith 100208173 part

providing essential override capability during system commissioning or power failures

Rheem-Ruud 62-102860-02 Furnace Control 322027-701 What causes a 1014863R contactorThe Rheem Ruud 62 102860 02 Integrated Furnace Control is a critical replacement board designed for specific R 801S, R 801T, and R 802V series gas furnaces. This OEM control board manages critical sequencing including induction motor startup, igniter warm up, and blower motor speed control. It is engineered for single stage and two stage heating applications, integrating a 7 segment LED display for onboard HVAC diagnostics and fault code