27" WC switch to trip frequently

Optimized Flow Control: Specifically calibrated for a CV of 25 to maintain equal percentage throttle response

This control handles standard pilot duty and power loads typical in residential and light commercial air handlers

Reduced Downtime: Simplifies field service

Its flame-retardant polymer construction prevents stress cracking and ensures a long-term

Lochinvar & A.O. Smith 100208486 Indicator Board 30067439-890 27" WC switch to tripThe Lochinvar & A. O. Smith 100208486 Indicator Board is a critical diagnostic component designed for Copper Fin II boiler and water heater systems. This OEM display interface provides real time visual feedback on system status, allowing technicians to monitor the firing rate, blower power levels, and RPM diagnostics directly from the unit. As a direct replacement for legacy part numbers RLY2044 and RLY2044K, this board ensures seamless communication