ST9120G2008 | Honeywell Control Circuit Board

Honeywell · Industrial Automation & Electrical

Description  The Honeywell ST9120G2008 is a furnace control circuit board used in Honeywell, Tempstar, Heil, and ICP HVAC systems. Serving as the system’s “brain,” it manages fan control and monitors safety sensors and switches to regulate furnace operation.     Technical Specifications  Condition New/Never Used Surplus Brand Honeywell Category HVAC Controls Part Number ST9120G2008 Subcategory Furnace Control Circuit Boards Weight 0.65 lbs       Information About ST9120G2008 The ST9120G2008 is part of Honeywell’s ST9120G series of furnace control circuit boards, engineered to serve as the central control hub (“brain”) for HVAC systems deployed in Honeywell, Tempstar, Heil, and ICP furnace models. This OEM board coordinates fan operation, monitors safety switches, and manages system timing. It includes wiring harnesses to retrofit older furnace control configurations, enabling straightforward compatibility with legacy setups. Compact in size (~6 × 3 inches), this durable board offers efficient diagnostics via integrated LED fault indicators and comes with clear installation diagrams—making it ideal for maintenance and replacement in residential heating systems . Key Features: OEM Direct Replacement: Compatible with models originally requiring part numbers ST9120G2008, ST9120G2016 (Honeywell #1138‑83‑200A), and various ICP/Tempstar/Heil OEM part variants. Compact Form Factor: Measures approximately 6 × 3 inches, ensuring easy integration within furnace housings without space constraints. Comprehensive Wiring Harness Kit: Includes multiple adapter harnesses to support a variety of connector types—making it ideal for retrofitting older system configurations without rewiring. LED Diagnostic Indicators: Built-in LEDs provide clear fault code readouts and operational status, simplifying troubleshooting and service validation. High Reliability and Durability: Constructed with robust electronic components to ensure consistent performance and longevity in residential HVAC applications. Easy Installation: Clear diagrammed instructions are included, making installation accessible to qualified HVAC technicians and DIY users alike. The ST9120G2008 is a reliable and versatile OEM control board, ideal for replacement and retrofit use in compatible furnaces from Honeywell, ICP, Heil, and Tempstar. Its plug‑and‑play compatibility, diagnostic clarity, and compact design make it a trusted choice for restoring HVAC system control and safety functionality.

Brand: Honeywell · Category: Industrial Automation & Electrical

Key features

• OEM Direct Replacement: Compatible with models originally requiring part numbers ST9120G2008, ST9120G2016 (Honeywell #1138‑83‑200A), and various ICP/Tempstar/Heil OEM part variants.
• Compact Form Factor: Measures approximately 6 × 3 inches, ensuring easy integration within furnace housings without space constraints.
• Comprehensive Wiring Harness Kit: Includes multiple adapter harnesses to support a variety of connector types—making it ideal for retrofitting older system configurations without rewiring.
• LED Diagnostic Indicators: Built-in LEDs provide clear fault code readouts and operational status, simplifying troubleshooting and service validation.
• High Reliability and Durability: Constructed with robust electronic components to ensure consistent performance and longevity in residential HVAC applications.
• Easy Installation: Clear diagrammed instructions are included, making installation accessible to qualified HVAC technicians and DIY users alike.

Specifications

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