How do I know if this capacitor needs to be replaced

Direct Cross-Reference: Professionally recognized as identical to the 90-396021 conversion kit for simplified inventory management

Supports a wide voltage range of 115V-220V

it can function in any 24V application requiring an SPDT relay

Rated for 400VAC and 50/60Hz

Williams P323096 Fan Switch How do I know ifThe Williams P323096 Fan Switch is an essential OEM replacement component engineered for precision blower control in Williams Vented Room Heaters and Hearth Heaters. Designed specifically for integration with Williams Blower Accessory models 2101 and 2102, this switch manages the fan cycle to prevent the distribution of cold air during initial startup. By delaying blower activation until the heat exchanger reaches the appropriate temperaturetypically