The Lennox 103699-01 is a furnace control board designed to regulate ignition, burner operation, fan control, and safety functions. It ensures coordinated heating performance with precise sequencing and built-in safety monitoring.
| Condition | New/Never Used Surplus |
| Brand | Lennox |
| Category | Control Boards |
| Part Number | 103699-01 |
| Subcategory | Furnace Control Boards |
| Functionality | Ignition sequencing, fan control, flame sensing |
| Compatibility | Selected Lennox furnace models |
| Safety Features | Automatic shutdown on ignition failure |
| Construction | High-grade printed circuit board |
| Installation | Direct replacement, no rewiring required |
| Diagnostic Features | Supports fault detection and troubleshooting |
| Weight | 1.0 lbs (approx.) |
The 103699-01 is an original Lennox OEM furnace control board built to manage all primary heating system operations. It controls ignition timing, gas valve actuation, blower motor operation, and flame sensing, ensuring efficient and safe furnace performance. This board is manufactured with high-quality components and durable PCB construction to withstand the heat and vibration of furnace environments. It is designed as a direct replacement for compatible Lennox furnace models, allowing straightforward installation without wiring modifications. Available in new and surplus condition, it remains a trusted choice for maintaining long-term system reliability.
Key Features:
Complete furnace control sequencing: Manages ignition, gas valve operation, and blower motor timing for optimal heating cycles.
Integrated fan control: Activates and deactivates the blower in response to system temperature and operational status.
Advanced flame sensing technology: Continuously monitors flame presence for safety and automatically shuts down the system if a fault occurs.
OEM-grade compatibility: Designed to fit and function exactly like the original installed component for seamless replacement.
Durable PCB construction: Built from high-quality materials to resist thermal stress, moisture, and mechanical wear.
The 103699-01 delivers the reliability and precision required for safe, efficient, and consistent furnace operation in residential heating systems.