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    • Honeywell Furnace Circuit Control Board ST9120C 4057 ST9120C4057

      eBay Condition: New OEM/After Market: OEM Brand: Honeywell Part #: CB HW 40403-03 Replaces: ST9120C 4057 ST9120C4057 Description/Specs: The Furnace Control Circuit Board is the brain of the unit. Nearly every function of the furnace is controlled by this control board. Many times, a control board will be equiped with an LED diagnostic light. When y ...  More $134.99
    • Honeywell ST9120C4057, HQ1011927HW Furnace Control Circuit Board

      eBay For sale used Honeywell ST9120C4057, HQ1011927HW furnace control circuit board. Item was removed from working furnace for upgrade. It was tested and it is in working condition. For more details see photos. $49.0
    • Honeywell ST9120C4057, HQ1011927HW Furnace Control Circuit Board

      eBay For sale used Honeywell ST9120C4057, HQ1011927HW furnace control circuit board. Item was removed from working furnace for upgrade. It was tested and it is in working condition. For more details see photos. $54.0
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