Always verify your part number against the original equipment manufacturer's technical documentation

Operational Safety: Provides the precise thermal feedback necessary to avoid scalding risks and equipment damage from overheating

Enhanced Cathodic Protection: High-grade magnesium construction provides superior protection against galvanic corrosion in hard water environments

ensuring zero-gap fitment during HVAC troubleshooting and installation

By choosing the official ASCO replacement parts

Field Controls 602609900 Circuit Board Kit 321894-708 Always verify your part numberThe Field Controls 602609900 Circuit Board Kit, also known as the CK 63 Control Kit, is a specialized 120 VAC interface engineered specifically for oil fired heating appliances coupled with SWG Series Power Venters or Field Draft Inducers. This technician grade replacement board (part number 46399200) serves as the primary solid state logic for managing the post purge cycle, effectively exhausting residual flue gases once the thermostat is satisfied.