Lochinvar 100304165 Main Control Board for Knight Boiler - WHB399

The Lochinvar 100304165 is a genuine OEM main control board designed specifically for Knight WHB399 wall-mount boilers, Series 100 through 110. This critical electronic component serves as the central controller for your boiler's operation, managing all primary functions including ignition sequencing, temperature control, safety monitoring, and system diagnostics.

Key Features:

• OEM replacement control board ensures proper fit and function
• Compatible with WHB399 Knight wall-mount boiler models (Series 100-110)
• Controls all primary boiler functions and safety systems
• Direct replacement for failed or malfunctioning control boards
• Factory-calibrated for optimal performance

This control board works in conjunction with the SMART SYSTEM user interface to provide reliable operation of your high-efficiency condensing boiler. When your existing control board fails, replacing it with this genuine Lochinvar part ensures your WHB399 boiler continues to operate at peak efficiency and maintains all safety features. Professional installation by a qualified HVAC technician is recommended.