Lochinvar & A.O. Smith 100277770 Control

The Lochinvar & A.O. Smith 100277770 Control is a critical integrated control board engineered for high-output commercial boilers, specifically the FB1501-2001 series. As an essential OEM replacement part, this module manages the full ignition sequence, blower speed regulation, and safety circuit monitoring to ensure peak thermal efficiency. It is compatible with Power-Fin and Crest models, including the FBL1501, FBL1751, FBL2001, FBN1501, FBN1751, and FBN2001 units starting with serial number 4015. This HVACR control board processes real-time sensor data from the inlet, outlet, and flue temperature probes to modulate firing rates and maintain precise setpoints. Designed for rugged field performance, the K Control FB1501-2001 features advanced diagnostic capabilities, allowing technicians to quickly troubleshoot boiler error codes related to flame rectification, air pressure switches, and gas valve synchronization. Replacing a failed 100277770 integrated control restores reliable communication with the SMART TOUCH interface, eliminating lockout issues and ensuring the hydronic system operates within engineered safety parameters.

• Precise Modulation: Regulates blower speeds and gas valve voltage for optimal combustion and energy efficiency.
• Direct OEM Compatibility: Engineered specifically for FB1501-2001 series boilers, ensuring exact fit and pin-to-pin wiring alignment.
• Comprehensive Safety Monitoring: Continuously audits the low water cutoff (LWCO), high limits, and air pressure switches to prevent equipment damage.
• Enhanced Diagnostics: Provides detailed system status through the interface to identify specific fault conditions quickly.

• Which models does the 100277770 support? It is designed for Lochinvar and A.O. Smith boiler models FBL1501 through FBN2001.
• Does this board replace the communication harness? No, while it interfaces with the harness, communication errors may still require checking the 100304495 display cable.
• How do I verify if this control board is faulty? Technicians should check for 120 VAC at the power input and verify fuse F3 integrity if the display is non-responsive.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.