Furnace Control Board ST9120U For Honeywell
Furnace Control Board ST9120U.
Universal wiring harnesses included for simplified field installation
LED indicators provide status and diagnostic information for faster troubleshooting
Fan on/off delay settings field-configurable through dip switches
Replaces 41 existing Honeywell Resideo controls
This circuit board had been installed in a gas furnace in December of 2021 and removed in good working condition in December 2022. Furnace was replaced due to heat exchanger.