The Toyotomi Main Circuit Board, part number 20472312, is a replacement electronic control board used in select Toyotomi/Toyostove direct-vent heater models to manage and coordinate the heater’s control functions including safety timing, blower operation, fuel pump sequencing, thermostat response, and error detection. It replaces the original main control board when the existing unit fails, malfunctions, or no longer reliably communicates with internal sensors and components. This board is engineered to match original equipment specifications so it installs directly into the heater’s control compartment without modification. :contentReference[oaicite:0]{index=0}
This main circuit board is intended for service or repair when electrical faults, intermittent operation, failed sensor responses, or unresponsive controls indicate a failed control board. A properly functioning circuit board helps ensure correct sequencing of ignition, fan control, fuel delivery, and safety shutdown functions, supporting reliable and stable heater performance. Installation should be performed with the heater powered off and per the model-specific service instructions to ensure connectors are fully seated and wiring routing remains consistent with manufacturer guidance. :contentReference[oaicite:1]{index=1}
What’s Included: One (1) Toyotomi main circuit control board, part number 20472312.
Installation Limits: For replacement use only on compatible Toyotomi/Toyostove direct-vent heater models; install with the heater powered off and follow the service manual to secure board and connector engagement.
Compatibility: Compatible with select Toyotomi/Toyostove direct-vent heater models that use the 20472312 main circuit board as specified in the parts diagram and service documentation. :contentReference[oaicite:2]{index=2}
