This comprehensive furnace circuit board upgrade is designed to replace obsolete Heatcraft boards

allowing for fine-tuned performance on-site to prevent liquid slugging and ensure maximum evaporator efficiency

is a high-performance thermal loading valve element designed for solid fuel boilers and biomass heating systems

This 1/20 HP 208-230V motor operates at a fixed 1550 RPM

it is designed for integration into standard 24V HVAC control loops found in commercial Trane equipment

Lochinvar & A.O. Smith 100187866 Burner Assembly 320734-701 This comprehensive furnace circuit boardThe Lochinvar & A. O. Smith 100187866 Burner Assembly is a precise OEM replacement part engineered for high efficiency commercial and residential water heating systems. As a veteran technician knows, maintaining combustion stability is non negotiable for system longevity, and this 10,000 to atmospheric rated assembly ensures the correct fuel to air ratio for clean, consistent ignition. Designed as a direct fit for specific A. O. Smith Cyclone and